Chapter Text
Suki and Yuki, well… They were the kind of twins who had a penchant for getting into trouble. It wasn’t really their fault, not all the time, but trouble always seemed to find them. They were, at least physically, identical, though those who knew them better would be able to tell the twins apart from their style of dress and the little mannerisms that set them apart. When they’d been younger, much younger, they’d mimicked each other to make it even harder for people to tell them apart, purely as it had amused them.
That had been the start of their wickedness, always with Yuki being the leader of the subtle chaos they caused. It was not so much pranks the twins pulled, but a stream of chaos, most certainly, was left in their wake.
Their appearance, however, often got them out of said trouble – or skating by without any implication at all that they had been involved in the unrest. Maybe it was just their natural influence, but only a greater power in the universe, the one that was set to ultimately claim them, could say that.
With slender bodies and moderate to small breasts, they drew attention physically – and their facial features were light and defined as “cute” to many. Suki and Yuki both had high cheekbones with an easy smile, though Suki was the quieter of the two. She wasn’t shy but had always been something of a serious individual. With their smaller bodies, they sometimes lamented being able to find clothes that fit them well, though that was pretty much something most women in the country had to deal with.
Some problems did not escape even those fated for something more.
The twins stood before the old Crowley mansion, which had been condemned for at least half a century. Suki’s hair was tied back in a ponytail, though a few stray hairs remained around her face, while Yuki had her hair loose and carefree. Their styles, when it came to hair, were fairly similar, coming down slightly past their shoulders and long enough to be tied back, both of them with a long fringe that was swept to the side, as a part of their hair.
“Are you sure we should go inside, Yuki?” Suki said, her lips pressed a little more tightly together as they pursed, though she was interested really. “You know what everyone’s been saying about this place.”
Yuki grinned, her brown eyes glinting with wicked glee.
“Of course – that’s why I want to go inside,” she said simply, for everything came down to a simple answer with Yuki. “It would be boring if we were just allowed in… And who knows what is really in there.”
Suki sighed and shook her head.
“It is interesting,” she admitted, “but no one has even rented it since the last owners died.”
Yuki rolled her eyes.
“Yeah, yeah… Well, that’s how tales go, isn’t it? I heard the last owners went mad and were found clawing the paper from the walls.”
“That would be a better fate,” Suki shot back, though even she could not be denied her curiosity. “What about the couple that just dropped dead in there? Or the others that were found gone from carbon monoxide poisoning? The ones of sudden cardiac failure?”
Yuki’s eyes glittered, lips pressed into a tight smirk.
“That’s what makes it fun, Suki. And I know you just need that extra little push to go in. Do we really have to go through this every time we try something?”
Suki grumbled, but, honestly, Yuki was right about her. She did just want to have that back-up, the sense in the back of her mind that “her sister made her do it.” Not that either of them had really ever got into any kind of trouble, but she was the more sensible twin, even if only in her own mind.
“It’s just annoying Brad didn’t show up to help us get in,” she muttered as she followed Yuki in past the signs – “no entry” – and the boarded-up front door. “How are we meant to get by all this?”
“Hm…”
Grumbling a little to herself, Yuki moved around the mansion. It was strange, up there on the hill, though it didn’t feel like it was all that far out of the main, hustling thoroughfare of the city at all. With the grounds as overgrown as they were, it was mostly obscured too but for the roof. The tangle of undergrowth was trickier to get through than the window of the house itself, for the twins had already been told about where someone else, mucking around on a drunken evening, had found a weakness in its defences.
The gate, of course, had been impassable. But iron railings surrounding the estate had been worn away over time, rusting where the old metal became increasingly brittle. A little force had snapped a couple of them, allowing easier entry, while those that managed the estate were none the wiser.
Suki kept her mouth shut as she slipped in through the window with Yuki, the gap between the boards not wide enough for her to get through without dragging at her clothes, snagging and tearing the hem of her T-shirt. Her jeans didn’t fare too badly, however, though it was as if the house was already unwelcome to her, squeezing around her as if her body was too large for it to hold.
Yet that was a silly thought to have in mind for a mansion…right? It was three storeys tall, there was plenty of room in there. It wasn’t the biggest abode in the world, however, so they would surely be able to check out everything in there.
The house was certainly old, very old, with a smell of must and damp permeating the air. Bugs scuttled across the floor, all with too many legs, though there was still some old furniture in there.
“At least Brad told us about the window, from his friend,” Yuki murmured, hushed in awe of the world left behind in the mansion. “It really doesn’t look like anyone’s been in here… And I thought there were kids breaking in all the time.”
Suki snorted and rolled her eyes.
“Oh, please, Yuki, you know what kids are like. They say things like that all the time.”
“What, and you think you’re so much more mature now you’re an adult too?”
Maturity, after all, came in time. Time that the twins, even if they didn’t know so, did not have.
“I thought there would be things like bottles and broken glass,” Suki commented as they moved into what looked to have been a living room at one point. “Things that other people breaking in left behind.”
“I don’t think many actually ever managed to get inside,” Yuki added, brushing her fingers over a long curtain that hung over a window, sweeping to the floor. “Maybe they didn’t dare leave anything behind?”
That was merely speculation, but it hit a note of truth in the twins as they stilled, heartbeats fluttering – yet quietly. It was not a place in which they needed to raise their voices or make too much clamour. It was not the kind of space in which anyone who did so survived.
“This is so weird,” Yuki said, having beckoned Suki up a set of stairs to the first floor of the house, above the ground floor. “There are even still piles of clothes in here.”
Suki’s gaze trailed over the bed, her skin prickling. She couldn’t decide whether that was from excitement, anticipation or something else entirely, though she wouldn’t have ever called the sensation that of being nervous. Even with her caution, that wasn’t something that happened to her.
“Isn’t that over there, on the bedside table,” she said hesitantly, peering at it as the hairs on the back of her neck lifted. “That… That looks like an Ouija board.”
Yuki nodded.
“I think so too. There was a bundle of scrolls, like real scrolls, piled up in one of the reception rooms downstairs too.”
Once they’d noticed those, stepping around a pile of clothes that, if they’d been looking more closely, did not appear to be from the era of the last occupants of the house, they couldn’t stop finding them. Occult items, or what they perceived to be such, littered the house, from the torn paintings of demonic-like figures that popped up occasionally on the walls to the tamer, round, “pebble-like” decorations, featuring the moon and the stars and the sun in various configurations. It was as if there were clues left there, the house frozen in time after the previous occupants had all left, yet something remained there from each one.
The kitchen was expansive, with copper pots and pans hanging up by the stove as if the inhabitants were going to come back at any time. Some of the doors to the kitchen cabinets, old and made from fine, polished wood, hung open, others on broken hinges. Where some of the bulbs in the house were left bare, others were shattered. Who could have known what had happened to them?
Suki peered into a corner of the kitchen where a tall, slightly narrower door begged attention. The handle was oddly bare of any dust or debris, even shiny. Even the wood itself gleamed as if it had just been fed with oil to keep it in good condition.
Regardless of why, it stood out.
“Hey, check this out,” Suki said, trying the handle. “Maybe this is one of those old-style pantries or something, where people used to keep food to keep it cool. Maybe… The handle is stuck though… Oh!”
Whereas the handle had been giving her some trouble, a little jiggling it sent a resounding clunk through the door and her hand. The door swung outward when she pulled it lightly, not even creaking on its hinges. Somehow, that was creepier than it would have been if the door itself had made any noise at all.
Stairs greeted them and, for a moment, the sisters were silent. There was no scent to the air that came up from what had to be presumed to be the basement, the stairs plunging into darkness as if they went on forever.
“We’ve got to go down there,” Suki breathed, though she stepped back, checking the kitchen drawers first. “The electric in this place is definitely off, or condemned. We’ll need to see, somehow… Aha!”
Thankfully for her, there was a dirty box of long matches in one drawer, along with some leftover, mismatched cutlery. It took Suki a few tries to strike it, while Yuki teetered down a couple of steps into the basement, but she got a match lit and shoved the remaining, soft box into her pocket. With how worn the edges were, it was a wonder it had retained its structural integrity in the slightest.
The twins, however, had no idea that no one else had been down into the basement before, even though no one had ever talked about it. People hadn’t spoken much of what they’d actually seen in the mansion, so that in itself was not unusual.
A small shelf on the way down into the basement boasted a small skull: perfectly preserved in every way. The eyes tracked the twins as they descended.
There was no creak to the stairs as they made their way down, only a dull, plain “thud” as their sneakers connected with each wooden step.
Thud.
Thud.
Thud.
And then they were down, even if they could never have known what they’d broken. The essence of change wisped around them, although it didn’t exist on a plane of existence that either of them could sense.
Suki peered at the walls, dark stains looking almost like blood, though the room itself down there was not what she’d anticipated. There were several desks in there and strange inscriptions on the floor, drawn in what seemed to be a substance made from a paste left in a bowl on one of the tables. At least that looked like it was formed from some kind of plant-matter, from the wilted, dried, paper-fragile plants and flowers left hanging there from the ceiling beams.
Yet it didn’t look right, for everything down there was too quiet, as if all sound had been deadened. Suki swallowed harder than she would have been proud to admit, her heart drumming in her chest.
But, no…she was not nervous. Not at all. It was just different, yes: that was it.
“What was the last longest inhabitant here?” She asked, her eyes unfocused as they swept to an open book on the table, dust covering it and obscuring the text. “Was it… Cawley?”
“Crowley, The Crowley Group,” Yuki said, even her voice hushed. “They studied the occult, but everyone thought they were crazy. Of course, most people who do aren’t in their right minds, they end up being cults in one way or another most of the time.”
“That makes sense that there’d be this kind of stuff down here though, but wouldn’t you have thought someone else, someone who’d lived here, would have moved it?” Suki shook her head. “Are we the first ones here? Or did the others leave it here like a shrine?”
Yuki frowned.
“That door was stuck pretty fast, maybe they thought it was just a cupboard or something. Maybe no one knew about it. It’s just how nothing seems disturbed, though there’s more of these clothes on the floor…and up on the chairs too.”
Piles of clothes had been shoved against a wall, while Yuki’s eyes trailed over an arrangement of crystals on a desk, which seemed to be settled into a specific pattern. However, she had no idea what it signified as Suki held up the match, not noticing that the single match illuminated more of the basement than it ever really should have.
Alas, they never would find out just had had befallen The Crowley Group and just what they had sealed away down there, even if they were going to be intimately familiar with it. There was a big difference between experience and knowledge, after all: and the twins didn’t need the latter for the former, not in the slightest.
They didn’t feel the creature slipping into them, its ethereal essence winding around and easing into their bodies, feeding itself in through their nostrils and ears, even through their mouths. Their talk was tiresome to the beast, who had starved for so long.
It was time the demon, who had been summoned by The Crowley Group and locked away, subsequently, fed at long last. Released, there was no one left capable of stopping its hunger.
Yuki blinked as the last of the demon’s essence slipped into her, though she did not know what had happened. Slightly dizzy, she pressed her hand to her forehead and glanced between a chair and the stairs, unsure of which option to take.
“I feel really weird, maybe we should get out of here.”
Yet Suki murmured, shaking her head. Warmth pooled in her stomach, flooding out through her entire body. It spread through her as she took a deep, smooth breath, closing and releasing her fingers as if she was trying to make a fist, yet it was merely something different settling into her.
“Why would we leave, sis?”
She all but purred, stepping up to her sister with a gentle smile on her face, even if that was very much not a way in which Suki acted. Yuki shook her head and tried to regain a sense of what was around her, though was glad when Suki put her hands on her waist, steadying her.
The match she’d been holding dropped, but it did not fall.
“Ah, thanks, Suki,” she said. “That was really weird, I just felt like I was tipping off-balance, kind of like my centre of balance was all out of whack, suddenly, just like that.”
Suki, however, wasn’t listening to her. It wasn’t important, not in her mind, not as she leaned in and crushed her lips to her sister’s. Yuki grunted into Suki’s embrace, confused – but it was only a momentary struggle. For she had been possessed by the same demon her sister had and there was simply no coming back from that.
They were vulnerable. They were unprepared.
They had always been the demon’s intended victims.
“Mmm…”
Yuki groaned into the kiss, some part of her pressing into it, accepting her sister’s touch even though that was very much not something either of them had ever done before. Sure, they were warm with one another and occasionally kissed each other on the cheeks, but no more than that. Hugging, yes; cuddling, sometimes. No more than that had ever come to pass.
Yet it felt right as her lips parted and she hungrily accepted the ravenous plunge of her sister’s tongue into her mouth. The match that had been forgotten floated above them, its light expanding to fill the room until every trace of darkness in the basement in itself was snuffed out.
The darkness, after all, had found the host bodies it needed to expand.
“Mmph… Ah…”
They kissed each other fiercely, as if they were one body and mind in that moment, tongues swapping between their mouths. They’d never kissed like that before, regardless of how close they’d been with one another, and Suki grabbed the back of her sister’s head, fingers tangling into her brown hair.
Their eyes closed as they made out like they were the only two people left in the world, yet their need was greater than what their mouths could spare. Under their skin, infiltrating every fibre of their beings, the demon swelled, rumbling and grumbling and pushing out against the bodies and the skin that contained it.
Out… Out…
It had to grow. It had to get out.
Yet the bodies would have to grow along with it – at least for the time being.
Suki panted heavily, breaking the kiss as she squirmed back and forth. Her sister didn’t allow her to back off, however, and latched on to her neck as if she was starving for her, kissing and nipping at her skin. Love bites were left in the wake of her adoration, though the imprints of Yuki’s teeth were swift to fade.
Her skin rippled over the impressions that her sister’s teeth made, as if her flesh had suddenly become soft and malleable, even though Suki was still capable of standing on two feet. She swayed, holding her hands out to either side of her body with her elbows bent and her palms facing down. Even though Suki’s eyes were open, her gaze was hazy and unfocused.
“Unfff… This… I need… Too small… Too tight…”
The words and groans were not her own and yet she had to talk all the same, her head falling back and putting a line of strain obviously down either side of her throat. She gulped hard, lips agape and eyes staring, her back bowed as if called into position by a higher power. And, perhaps, that was exactly what the demon was.
Suki didn’t need to know as she swelled, her limbs growing, though it was not as if the fat on her body was inflating. Everything grew in proportion – at least for the time being – as her jeans slowly pulled tauter around her thighs, digging into the crease between her legs and pulling up into the folds of her sex. She groaned as her arms fell looser, losing the bend at her elbow, though her sister didn’t seem to notice. Yuki was too caught up in kissing down her sister’s body, finding her breasts and nuzzling at them through her clothes.
As Suki’s body swelled with demonic possession, Yuki focused on Suki’s breasts. Her nipples puffed out as if they were pert and aroused through the fabric of her blue T-shirt and her bra, though the notion of that being strange to her simply didn’t cross Yuki’s mind. She nipped and bit hungrily at her sister’s nipples through her clothes, sucking ravenously on them as if they contained something she desperately needed to take for her own.
“Ohhhh…”
Yet she swept her hands up and down her sister’s body as Suki’s shirt rose slowly, exposing more and more of her stomach as her jeans pulled down against her crotch. Yuki laughed allowed, exhilaration flowing through her veins. Everything just felt so…good! It was as if every sensation had been heightened, allowing her to feel and simply exist as she never had done before.
Suki, on the other hand, squirmed and panted and fought the restriction of her clothes. Her T-shirt pulled down against her tits where it was scooped into a U-neck, exposing a small amount of cleavage previously. Yet her breasts grew at a more rapid pace than the rest of her body, drawing her shirt up under her armpits.
To Yuki, she was wonderful, exactly the way she was. Suki’s breasts spilled out over the neckline of her shirt as if they had never meant to be contained, the flesh bubbling over. Her shirt may have cut into them, but that only enhanced the cleavage and the beauty of her tits, at least in Yuki’s opinion. That sense was warped, at that time, but she just wanted her sister close to her.
She wanted absolutely everything of her sister, devouring her in the rawest state possible as she groped and grabbed at her. She tried to dig her fingers into that fresh rise of flesh, where Suki’s tits were ballooning out, but they were so strained already that there simply was no way for her fingers to indent her sister’s skin. Even that was intoxicating, inviting her to rub and attempt to grope, hands sliding down over her sister’s fattening backside.
Suki wriggled, grunting as painful stabs of growth pulled through her. Her muscles ached as they grew, filling out her clothes, though her underwear stretched, trying to contain her body as long as possible. It didn’t seem possible, already, for her clothes to be holding up as long as they had, but they clung on to her, the seams, exceedingly slowly, popping.
One stitch after the other worked free as her shirt grew tighter and tighter, although something bloomed between her legs too, pressing out urgently at her crotch. Suki shook her head, fighting it as the strain of her flesh bubbling caught a more frantic part of her mind, although there was only so much, even then, she could do.
Suki was only human, after all.
Yuki stared as her body joined Suki’s in transforming, though Suki was already a good head and shoulders taller than her. If asked, Yuki wouldn’t have been able to say why it was invigorating to have her twin towering above her, though they were going to match up again soon enough. She held out her arms with a moan that was half pained and half aroused, dancing along the line where the two things merged.
“Ohhhhh…”
Yet neither would ever be able to stop the transformations the demon forced upon them, roughly moulding their bodies to his whim. Yuki staggered back, one clumsy step after the other, until her back came up against the desk. It rocked and she gripped it tightly as her body swelled, forcing itself up against the confines of her clothes. An inkpot, aged and out of date, toppled over on the desk and she leaned back even more heavily against it as her body ached with transformation.
Or mutation, perhaps, would be a better way to describe it, for a mutation was not something, most likely, requested. Yuki’s head swam, chin tucking forward to her chest despite the strain it brought to the back of her neck. Her lower half was the first to grow properly, though her entire body lengthened, allowing her height to increase. It just wasn’t in proportion as she watched her legs fill out her jeans as if she’d suddenly gained weight, the tough material bulging where it struggled to hold her back, even in that moment.
Letting out a deep, guttural groan, Yuki bent her elbows, as if she was about to push back up from the desk she had braced against. It was too much, much too much, the strain of trying to break out of her clothes pummelling her psyche. Burning arousal collided with pain, brimming over in her underwear as the elastic of them dug in viciously to her flesh, biting the most furiously where the bones of her hips rose through.
Yet as her sister’s tits finally forced her shirt to give way in an almighty rip under the arms, Yuki’s jeans could not hold on anymore. Not as a monster of a cock and squashed yet swollen balls revealed themselves to be within her clothes, overly sensitive as if too many nerve endings, altogether, were clustered on the growing, fresh flesh.
She groaned, the swell of transformation sliding up her body, thickening her hips and her waist as her jeans bulged awkwardly. They could not fight it as the in-seam began to tear, spreading out wherever there were any weaknesses in the fabric, however tiny they were. Howling, she curled her torso forward while still bracing against the table, her torso thickening and her tits suddenly taking on the pull of her bra. Yet her clothes would never fully hold her, even as they were tested, against the will of everyone there.
Well, besides the demon, of course. They got everything they wanted, even if they were only just getting started.
Suki’s breasts rolled forth, spilling into her loosening shirt as rips showed through the fabric, slowly spreading across her chest as they grew from tiny tears to cuts that looked like someone had hacked away at it with a knife. Her breasts inflated as if they were being pumped up with air, though the surface-level tension of her skin there was less as her breasts found space to grow into. As her height increased, the rest of her body growing in proportion for the moment, her hips strained against her jeans too.
They could not hold out against that, a tear coming in the seam between her legs, though it was her own growing pair of balls and her new cock, moulded from her flesh, that did it for her lower half. Her jeans made a sound like someone raking their nails over fresh, starchy denim, though much louder, though Suki didn’t even notice. Not as her breasts pulled into the reach of her bra, popping one thread of elastic in the back strap after the other as they filled out.
Yet her clothes were never designed to hold out forever as with a near terrifying rip and stab of pain that arced straight through her body, her bra gave out. It was as if it had been just what her tits had been waiting for as they swelled and bounced in front of her body, pulling her forward and off-balance. Her back had not yet built the new, additional muscle to better support her chest, after all – if that would even be a priority of the mutation itself.
But it was Yuki who began her destruction of the room, over six feet tall and swaying as she tipped back further and further against the table. A big bulge over her crotch broke through her jeans, though her cock and balls had not yet found freedom from her clothes. She panted heavily, the desk creaking behind her, but it was not meant to last through her transformation. It cracked straight down the middle as her growing weight, her breasts and new accessories adding far too much, and a sudden, sharp growth spurt to eight feet tall had her crashing back through it.
Scrolls flung up into the air, hanging there for a moment as if they had suddenly gained the power of flight. A book, that looked like it may have contained spells or something similarly dark, flew across her vision, the ink pot joining it, along with a handful of old, broken quills. Some quills still had dried ink at the tips, although they would never again be used.
And then the moment sped up again, everything falling, crashing down around Yuki as she cried out. Pain pummelled her and she moaned, though there was nothing she could do as the impact allowed her cock to burst out through the front of her jeans. It punched through the denim as if it no longer offered any barrier at all to it, thrumming out in a blistering rise of swollen, fat flesh. The rounded head bulged into existence, gleaming with pre-cum, though that really was the least of Yuki’s concerns. The tear of it bursting through her clothes split down between her legs too, partially revealing her pussy.
Their bodies, however, caught up, more or less, to their growing breasts and other appendages, so they were only on the edge of being too large for them. That was still more than enough to challenge them as a pair of heavy nuts swelled out through the torn gap in Yuki’s trousers and Suki was forced to deal with hers growing down and popping out through the torn seam between her legs. It was not something that had ever been meant to happen, of course, and they would have to find a way to deal with it.
Or not, as it was.
Not as they grew and their clothes strained, underwear hanging on the longest, regardless of the exposing slits in it. Of course, there were their shoes to be considered too, though the size of their feet was not something the demon needed to focus on initially. They’d grown a little, cramping their toes and curling them in, the arches of their feet humping up to find all the space within their sneakers they could. As ever, it was never enough as they grew to ten feet tall and challenged the height of the basement ceiling.
Their bodies expanded, bras clinging to them desperately, though they were never meant to last. First a strap over the shoulder went on both of them – and then the back fully pinged free. Their breasts greedily took up the space offered to them and their shirts tore where their bodies swelled. Even though there was a considerable weight to their breasts, they rounded out perfectly as soon as they were permitted to, as if they were not subject to the same rules of gravity. In essence, if their bodies had been anything at all resembling “normal,” they could have had boob jobs to give them that perfect set of tits.
Yuki groaned, sitting up from where she’d crashed down, though the weight of her tits kept her in place, expanding out even more on either side of her body. Yet it was the cramps that latched on to her muscles as they grew down her arms and legs, even popping out on her abdomen, that hurt the most. It was a biting, pins-and-needles type of cramp, though she didn’t have the presence of mind to rub at her body to even attempt to relieve the tension.
Suki groaned as she pressed over Yuki, not thinking clearly in the slightest as she grabbed at her sister. Yet she got into the wrong position, her backside in Yuki’s face as she rocked back on her. Her clothes were still somewhat in place, stretching around her, though they looked less and less like clothes as she pressed her pussy over Yuki’s face. Yuki ate her out without thinking, grabbing on to Suki’s hips to hold her in place, a mess of arousal clinging to her lips and slicking down her chin.
Yuki groaned into Suki’s pussy, yet that was not all the moment was destined to be as Suki groped at her sister’s pussy. With her hands on Yuki’s inner thighs, she greedily pushed them apart even more, though she barely balanced there as she shoved a hand forcibly into her sister’s pussy.
Yuki’s lustful cry cut through the air as she exalted there, rocking her hips up as much as she could, though she didn’t have all that much leverage in that position. Suki panted heavily as she tipped forward even more, balancing on her sister’s leg with one hand while she ploughed her pussy full of her hand, fingers folded together into a cone-like shape. Her sister’s pussy greedily clung to her hand and yet opened around her fingers at the same time.
The pressure was there as she lost herself to lust, relishing in the feel of Yuki’s tongue lashing out over her pussy. It dragged more slowly over her clit, but Yuki didn’t have the presence of mind to capture her clit in her mouth and suck on it: they were too wrapped up in mutation for that. Only lust remained, the rampant arousal that desperately drove them on through the pain of their muscles growing, sinew and ligaments forced to expand unnaturally to accommodate the might of a new, growing body.
Suki rose, pulling her fist from Yuki’s pussy, heaving and panting. Lust had to be taken and, still, she stood while Yuki remained on the floor. Whining throatily, she shoved her own hand into her pussy, hitching up her foot on to a desk to do so. It creaked and threatened to snap under her weight, but Suki accidentally took more weight back on her other foot, on the floor, allowing it to hold its form.
Her sister, however, faced the confines of the basement first, still standing and trying to stand up straighter and taller. Suki gasped, eyes wide and strained, bulging from her skull, as she brought her hands up to the ceiling, her cock wobbling in front of her. It jostled back and forth, squirting pre-cum as if it was actually semen, and she hissed through her teeth, rolling her head from one shoulder to the other and back again.
“Unff… Can’t… No…”
She ached for something and yet her lust could not be satisfied in transformation, bringing what her body was doing against what her mind yearned for. What was happening to her? Why couldn’t she just fuck her sister like she wanted to? Her foot crashed through the table as she jolted to the side, kicking aside the splintered wreckage.
Suki’s eyes hungrily locked on to Yuki yet again as her sister’s delicious breasts bounced fully out of her shirt, which looked more like it had cut-outs in it as her body expanded further and further. Her jeans had pulled up and her shoes strained as her toes, finally, burst through the front, allowing them more room into which they could grow. While her jeans slowly stretched and tore around her crotch, hips and thighs, her body fought for the room it needed, swelling through her clothes like a sausage breaking out of the otherwise thin, weak barrier of its skin. Her body bulged in places it never had before, yet her mind was not at all in a place to grapple with the enormity of what was happening to her, chest shuddering as her breath hitched.
Yet Suki’s underwear hung on, even though her cock and nuts had grown down through the leg hole. The thick length of shaft swelled, throbbing with every pulse of growth that sang through it, though Suki whined and twisted, trying to bear through. It was impossible, however, as her mouth opened and close soundlessly, her clothes clinging tightly around the thick, needy girth of the cock she really should not have had.
The elastic bit into the side of her dick and she whined as her hands pressed up into the ceiling, fingers curling into it. As her body ached with pain, she didn’t even notice the spiderweb cracks racing out from her fingers as she bore up against the confines of the room.
“Ohhhhh!”
She moaned as the ceiling slowly gave up, allowing her to press through it, her head coming up against it as well as her hands as she curled forward, straining for space. Rubble rained down around her, dust clouding the air as plaster and timber bounced off her shoulders, scattering down around her lower body. Yet her clothes still split, a tear slowly aching down the line of her chest, seams stretching where they had not torn all the way through.
Suki moaned and swayed, blinking as she tried to regain her bearings, though her head spun and ached, throwing her off-balance. She was taller than the room, coming up on eleven and twelve feet tall if she’d been standing up straight, but none of that mattered as her underwear finally snapped at the waist. Her flesh rolled into it, smoothing out where it had been forced to bulge and ache around her restrictive clothes, the proportions of her body evening out where her clothes no longer got in the way.
Strangely enough, the part of her clothes that stretched the most was her socks, though they pulled down further and further, simply sliding closer to her toe where the fabric could not pull even further around her heel and ankle. Suki grunted as her upper back rounded and broke against the roof of the basement, rubble crumbling around her in a slew of grey dust.
Her sister remained on the ground as she expanded across the basement, her legs stretching out and a foot coming up against one of the walls at an angle. The flat of it bore against the wall, though her sneaker still sort of clung on to her foot. It tore across the top, so it merely stuck on her heel, dangling there in the shredded form of the shoe.
Yet it was how Yuki’s body expanded through the basement that was more problematic than ever, her cock spilling pre-cum or cum – really, she didn’t care. Not as she grasped at it, jacking off furiously and near enough sobbing as she finally got some of the relief she’d craved.
“Unff… Yes… Oh…”
Although she tried to speak, her words rolled out as if they were no more than moans, cutting through the clamour as she shuddered and almost drooled. Her cock throbbed vivaciously as more and more cream spilled from it, swilling out across the floor of the basement, spreading all too rapidly from wall to wall.
The slick, wet sound of her dripping hands sliding up and down the length of her dick filled the air, somehow cutting through even the groan of the house protesting around them. Yet Yuki’s cock still throbbed and demanded an ever-increasing amount of attention – attention she just couldn’t deliver for herself! Her eyes half-rolled back into her head and she moaned open-mouthed, horror twisting through her chest.
A part of her was aware it shouldn’t have been happening, the rake of her own breath against her eardrums, more and more cum spilling from her. She rocked her hips, not knowing what else to do, though she couldn’t help but bump up against Suki. The heave of otherworldly power bubbled against her skin, like a million souls all aching to force their way from her, every last one of them trapped within the confines of her skin. Breaking, she moaned and blubbered in broken lust as she jacked off furiously, yet there was no true relief to be had there.
Not until she grew. Yes… Yes, that was the answer, it could be the only answer.
After all, all she needed was some pleasure – something to take her away from the ache and strain of her body being ruthlessly forced into another form, a form she’d never taken willingly. Her shirt split across her chest, freeing more of her breasts, though her bra dug in and clung on, even though it should never have been anywhere near that doable.
Things didn’t have to be in the realm of reality anymore, not as the demon warped all it needed to, relishing in the control. Even the bite of Yuki’s bra cutting into her flesh as her chest heaved and bloomed out, the flesh jiggling, was a sense of restriction and control the demon placed upon her. In caging Yuki’s body, before freeing it, the demon re-lived just a little of the sealed torment that had been its life for so long.
Yet the demon would have done anything it needed to, all to get out. Whether or not it had been imprisoned didn’t change the fate it was set to complete, all for its own greedy purposes.
Yuki blinked up as a nipple popped free of her bra, moaning aloud, her sister grabbing her hands. Her twin hardly seemed steady on her feet in the slightest, though that didn’t faze Suki as she held her sister’s hands and leaned back. Her body swelled as her buttocks popped out further, though her flesh rippled and bubbled like it was malleable and mouldable, merely a toy to be shaped to the will of another.
“Mmmnnnn…” She groaned, working her tongue around her mouth as she hauled up her sister, though the roof restricted how high Yuki could stand. “Yes… More…”
Suki didn’t know what she was saying, not as pain collided with arousal and she ran her hands over her sister’s body, grinding up against her as her cock swelled. It bumped off Yuki’s as the two of them bore up against the ceiling, one of Yuki’s hands out against the wall, her fingers splayed flat. As she gripped it, cracks raced through the concrete, regardless of how old and stable it was, her hand curling into the foundations of the mansion as if it offered no resistance at all.
Yet the roof of the basement quivered against them as Suki forced Yuki upright, feeding off her lust so she did not have to feel the bulging ache and strain of her transformations snarling through her. The more sensible twin lost control as she heaved, very little to none of her clothing remaining at all as her bra was shoved off to the side, dangling off an arm like an accessory rather than a piece of clothing. Yuki’s bra elastic popped free finally, though there was no sense of release there, only her cock wavering before her, growing in proportion to her body while they outgrew the basement.
Yuki’s breasts bounced free, huge and oversized for her body even then, though it was hard to take stock of just how far their transformations had progressed when they were trapped as they were. The ceiling groaned and buckled, though Suki had already partially broken through, standing too tall for some time already, and Yuki rounded forward, trying, desperately, just to make herself fit.
But she couldn’t fit. She was never meant to be contained, not then and not ever. She was meant to grow, to let other forces pour through her, to see her body swell and throb and pulsate with desperate energy in a way that should never, ever have been normal at all to her. Yuki was left with nothing else to think about as they jostled one another for space, half-crushed against one another while they fought not to destroy the house they had entered of their own free will.
If only it had gone well for them…but it was not something they came through in one piece. They should have known that as Yuki howled, their growing bodies forcing them to crouch and try to make themselves smaller even more than before. Of course, it was a losing battle.
Their height ceased to matter, though Yuki adjusted her stance as their heads and upper backs, rounding their shoulders forward, cracked through the basement ceiling fully into the ground floor of the mansion. As the floorboards splintered and pushed up above them, her foot came down on a desk, shattering it into smithereens of wood. Old scrolls and quills were easily crushed underfoot as if they were not even noticeable, glass shattering and crunching. Where shards could have before pierced their skin, their bodies offered greater resistance, the demon fortifying them as Yuki grasped at her sister and desperately kissed her.
As they deeply French kisses, their moans bounced wetly from each other’s mouths, growing as if they were taking on the true form of giantess’, too large already for the house they were within. Yuki’s fingers dug desperately into Suki’s arms, though she humped against her sister as if there was nothing else in her mind. The fat length of her cock shoved brutally against her sister’s and slapped up against Suki’s stomach, glistening with pre-cum as more and more spilled from her.
“Mmmm…”
Moans and groans all entwined as they kissed furiously, like it was the only thing giving them reason in the moment. Suki half-collapsed into Yuki’s arms, though her sister held her admirably as their breasts squashed together, arms around one another, hands squeezing and groping as if it was the most natural thing in the world for them. Power thrummed through them, an electric force, and Yuki kissed her sister even more wetly than before, tongue sweeping and darting passionately into her mouth.
It could have been normal. Only, it was not. It was so much more than that as her hand found Suki’s tit and her fingers dug in almost greedily, like it was the only thing that could somewhat hold her mind in check. Things were already far too gone to ever be right again, of course, but the slide of smooth, swelling flesh against a shifting form had her humping furiously, hips rocking in deranged passion.
Yet they weren’t thinking about any of that as they used one another to steady themselves in the moment, Suki clawing at the floorboards as her swinging tits came up against the barrier between the basement and the ground floor, helping to smash through it. It was all they needed, holding on to bear through the pain of mutation. Even the pull and stretch of their skin, forced through changes beyond their wildest imaginations, came with a sharp stab of pain or, at the very least, discomfort, nipples bloating out as if they were about to spill something more.
Perhaps that would come later, however.
They kissed sloppily and Yuki groped her new balls, her hands, at the very least, large enough to cradle and grab at them. Pleasure more than took the edge off the pain, so she allowed it all to come through, bit by bit, losing her sense of self.
They expanded up into the hallway and part of one of the sitting rooms in the fancy mansion, their breasts bloating out on to the ground floor as they shoved furniture inside. The scrape of chairs being pushed out of the way and Suki’s tits squashing through a doorway came with an additional creak, the doorframe fighting her. Not that Suki even noticed, breaking the kiss with her sister to grope and massage her breasts. Dirt and dust from the basement smeared her breasts, though she didn’t care, not as her waist grew out through the hole. Her hips were the next problem for the floorboards to take on, bending and buckling up as they forced the mansion floor to make way for her.
Yuki hissed through her teeth, her hands around her cock – but she couldn’t quite fit them, not anymore. She grew upward, bowing forward and grabbing at the curtains, ripping them from the rail above the window. It didn’t matter who saw them, however, even as the curtains crashed down in a clatter and a rustle of old, musty fabric, dust puffing up in the wake of them. Howling, she tipped forward even more, her breasts swinging back and forth wildly as they swelled. Whereas they had, at least, been in proportion with her body before, they bloated out massively, bouncing off each other as her nipples wobbled, plump and begging attention.
On the edge of being hyper, Suki’s tits followed suit, but her cock and balls were the first to grow, slapping off her sister’s thigh as she desperately shoved her dick between Yuki’s legs. She ground up against Yuki’s balls and pussy from the underside, relishing the slick tease of Yuki’s arousal marking her cock.
“Ohhhhh… This… It’s…”
She felt like she should have been talking, though all that came out was a raunchy hiss.
“Whore.”
She forced out the word even though it had never been something to pass her lips before. She’d never used such crude language and yet that seemed to fit in that moment, as she stared lustfully at her sister, how she crawled her way from the basement. Yuki wriggled her hips with a jerking, jostling motion, cracking her way through as her head came up higher still, against the roof of the ground floor. There were two more floors above her still and Suki’s heart, somehow, surged.
She’d never quite know what that meant. But she wanted her slut of a sister to grow, yes. To grow more, to follow those forceful, snapping urges inside her and take the lead of passion wherever it drew them.
But she’d never have talked about her sister like that without the demon’s influence and the strain of brutally crude words only grew more powerful inside her as she howled and ducked her head. Her cock inflated, the skin straining before it grew to cover the thickness of her fattening member, but her balls hung down lower still, bouncing and jiggling against her inner thighs. If Suki had even been thinking about walking, she would have found that awkward if not impossible at that time.
She launched herself hungrily at her sister as she tried to lock her lips around a nipple, even as it grew and swelled out to the sides so it was too large for her to get fully into her mouth. Moaning against Yuki’s tit, Suki could only cling hungrily to her flesh, fingers digging into the soft expanse of skin and bite at her nipple. Her teeth dug into it roughly, but Yuki only cried out in pleasure, hair clinging to the dampness of sweat at the nape of her neck and her pretty mouth agape. Suki muttered and bucked, grinding her cock into her sister’s body. Even then, she didn’t care where it connected – as long as she got her pleasure.
“Mmmph… More… Get it…whore…”
She panted heavily, her breasts trembling with every breath, though her body didn’t really need air anymore: it was merely a reflex.
Yuki ran her hands and arms down over Suki’s tits, a part of her marvelling at the shape of them. Her head pressed against the ceiling of the ground floor and she tried not to think about it, even though there was a strange tugging in the back of her mind that told her all was not quite well in that moment. There didn’t feel like there was anything she could do about it, after all.
So, she tried groping more fervently while Suki swapped to her sister’s other nipple, biting and suckling at it as drool spilled from her mouth. The monstrous woman, if an outside observer had been describing her, heaved and slavered, her eyes unfocused. Maybe she had been drawn so low all she cared about was sex, her next breath of lust.
Her hands roamed Suki’s body, everywhere she could reach. It was much more than the initial gropes and squeezes, moving quickly from place to place, wantonly trying to take in everything she could as lust surged hotly through her. Suki’s lips and teeth caught at her nipple and she bit down too hard, drawing a ragged cry from Yuki that didn’t quite seem like it belonged on her lips.
It didn’t matter. Not as Yuki squeezed her sister’s flesh and pressed her thighs in around her nuts, even the plumpness of her pussy coming up behind them, drooling wetly. Yet they hadn’t orgasmed yet, not as the strain of arousal crawled through them, driving them on while they yearned for more, so much more. The lure of that peak had them grinding against one another again, Suki’s cock pressing up to the head of Yuki’s.
But Yuki grasped her cock and gripped it in place while something “gave” at the head of Suki’s dick. Slowly but surely, as they slowly crunched and cracked their way through the ceiling, Suki’s dick took Yuki’s inside. It bloated out around Yuki’s thick length of meat as her sister pressed her tits ravenously up against Suki’s again, nipples catching one another. In a similar fashion, Yuki’s nipples readily opened up to take Suki’s inside, suckling on them and pulsing around Suki’s body.
It was as if Suki’s nipples and cock had docked themselves within Yuki’s, yet neither found it odd in the slightest with the blissful rush of pleasure. Yuki grabbed and squeezed her own tits so she pushed her flesh into a cleavage, moaning aloud. If anyone had been nearby, listening in, they may well have thought there was a monster in the mansion. Only, that monster had been unleashed in a way no one could ever have expected.
They grew up, not bothering to use their hands to help themselves through into the next floor up. The carpet pulled up over Yuki’s head first, standing a little higher than Suki who was tipped forward with her breasts tugging against Yuki’s. Growing over twenty-three feet tall strained their bodies beyond any limits the twins may have thought they’d had, but those hardly mattered anymore.
“Oh… Ohhhh… Yes… Take my cock…” Yuki growled, the words flying from her lips in a drool of spittle, eyes huge, glazed and unfocused. “Yes, yes… Oh, I need it!”
She curled her tongue around the words, wanting to throw names out there, though she hardly knew what to say. Instead of letting the coarser language fly, she said the words in her head, letting the stream of consciousness wash over her.
Fuck me, whore, let my greedy, thick cock pound over yours, taking your seed, taking your cum, taking everything!
On and on and on, she howled, pulling her sister along with her as the carpet tore above their heads, ripping through. A picture swung and fell off the wall, yet the crash was lost. The house seemed much too small around their growing bodies, as if they were giantesses waking from a long slumber. Yet it was more as if they were monsters clawing their way through a child’s dollhouse, outgrowing it as they were never meant to be played with.
After all, they were not toys, not like that.
Suki’s body wobbled, though Yuki’s tits ground in against hers as they sucked hers into her body. She quivered, arching weakly against her sister as her mouth hung open in a long, drawn-out cry of lust, even as her breasts were devoured by Yuki’s. Her sister’s nipples merely opened up to pull her inside, pleasure washing through her. Her cock fared the same as it was lost entirely into Yuki’s shaft, which even pulled her balls inside too. The sucking, pulsating pressure around her nuts nearly had her cumming right there and then, though neither twin would have known what that kind of orgasm felt like.
They didn’t have to, not as they locked together, face to face and kissing desperately. They could no longer grind and finger one another in that position, of course, but their lust mounted as Suki’s tongue wetly slopped out. It messily filled her sister’s mouth as they kissed, drool rolling down from the corners of their lips and the damp smack of their tongues, though Yuki’s appendage swelled too. Extending rather than merely growing in size, it twined around Suki’s as if she was trying to dominate her, though neither sister was truly in control of the other.
It was all about the demon and what they wanted for their bodies. As the twins kissed and groaned, pushing up against one another, they came up against the limits of the hallway on that upper floor, even though they were barely even aware of where they were. A dull, throbbing ache billowed through them as they leaned back, crunching into a wall, tits above floor level. They, however, couldn’t expand and swell into the hallway, taking more space for themselves, with the twins locked together in that manner. Yuki’s tits bloated out, showing a very faint outline of Suki’s inside her breasts, yet only pleasure came from it.
Their tongues outgrew the confines of their mouths and Suki’s slurped back out of Yuki’s to slide down her chest. Longer and longer, their tongues extended wetly to wrap around Yuki’s breasts and even the base of Suki’s, where they could still be seen. Yet it was their cocks and balls that bore the delicious brunt of the attention of their tongues, curling around and wetly slavering, squeezing intently.
Tongues twined and danced around their cocks and balls, wherever they could reach, dragging around them and slurping wetly, though the drool of saliva was barely anything in comparison to the deluge of cum already flooding the bottom floor of the basement. With Suki’s cock being buried inside Yuki’s, there was only a portion of hers, of course, to please and tease as they were locked together, but that wasn’t something that really concerned either sister. Their tongues drooled and slapped wetly against their chests, though every sensation, the drag against their bodies and the slurp and drinking down of arousal was too much for them. They moaned, as if the sisters were one and the same, one mind alone caught by a passion that was set to devour them.
Their pussies, of course, were still in place too and having a cock and balls each did not negate from that pleasure. Yuki moaned, eyes half-closed, as her head came up against the ceiling of that floor and started to break through, though she made no move at all to make that any easier for herself. She would break through one way or another and it didn’t matter, not truly.
She was not to be contained, not as her tongue wrapped around her own cock with her sister’s dick deep inside, tongue slurping into Suki’s pussy. Tongue-fucking her sister’s pussy, she lapped viciously up against her G-spot with hungry intent, not even registering the sensations on her tongue. It was merely the tart flavour of her twin’s arousal that drove her on, humping and grinding while she sought her own pleasure.
It didn’t come, not quite. And yet she needed it, even as her own sex was pleasured, a slick mess of female arousal pouring down her inner thighs. It slopped down, trickling thickly over the edge of the floors she had already bashed through, finally pooling around her feet down in the basement.
Easily coming up to thirty-feet tall, they allowed the house to crack and crumble around them, breaking into the final floor of the three-storey mansion. Of course, there was much more across the estate they could expand into, for the house went back and across for quite a way, but that was none of their concern. Their groans tangled in the air as they leaned into one another, just about able to rest their foreheads together, despite their breasts separating them. It was only the soft, squashier nature of their tits that allowed them to press in so close – and the fact that Yuki’s had swallowed up Suki’s whole.
And yet their growth was what served to push them apart as they shifted their weight, calves and ankles breaking through floorboards and making walls crumble. Dust flooded the air as they crunched through the first floor without even thinking about it, turning a little as the joined wrecking ball of their tits helped sway and rock, turning the mansion into nothing more than glorified debris.
The Crowley mansion was not supposed to last. Not with all the time it had housed one of the most powerful souls that had come up from the underworld.
The sideways expansion of their shoulders and breasts, in proportion besides their tits being on the edge of hyper, swollen out beyond the sides of their bodies, crunched through the floors, though it was hard to say what was going on in any single moment. It was all a mess of chaos and a runner passing by the mansion outside paused, wondering if they were demolishing the mansion at long last. But surely they wouldn’t do that at night?
“What the fuck?”
The runner stumbled back as the walls shook, one side of the mansion’s roof sliding to the side, though it could barely be seen in the darkness. He cursed and tripped over his own feet, fumbling for his phone, but it would be due to him leaving it at home that no one else in authority arrived on the scene in time.
That was just as well, for there were not to be any casualties at the mansion that night. However, a spectator may well have adored the horror of the twins’ growth as they burst through the roof slowly, an arm swinging out to the side and punching through both a wall and a window like they had the consistency of paper. Bricks and mortar sprayed out from where the house had been painted over, though the paint had peeled over time from being allowed to languish in such a state of disrepair. Boards tore from windows as the frames they had been nailed to cracked and crumbled, the rot that had spread through the mansion itself finally allowed free.
And then there were the twins, rising above it in monstrous form, cutting two striking figures in the dead of the night. The rumble and crunch of the mansion trying and failing to hold them echoed through the city, down into the more built-up areas, yet no one would rise swiftly enough to catch them. They didn’t look at all like Suki and Yuki anymore, their previously slender proportions concealed by their tits and throbbing cocks and balls, Suki’s merely there to feed the size of Yuki’s in the best of ways. Their hair had fallen loose and even seemed a little longer, messily hanging around their faces and clinging to the backs of their necks.
A long, lewd slop of a tongue dragged up and over Suki’s right hip, although neither twin could have said who it belonged to. It didn’t matter anymore, not as a wash of fluid poured from them, yet it didn’t feel like orgasm. Their balls ached, allowing a rush of cum out, pouring into one another and, in a way, forcing some of their own back up into their balls. Their milk mixed too, their breasts inflating with the lewd, washing spill of it, yet no cum or milk could escape them when they were forced together like that.
Their nuts billowed with the cum that was forced back until them, bodies pulsating and inflating and growing beyond what anyone should ever have believed – at least, with their own eyes. The lone runner let out a strangled sound and stumbled back, eyes wide and jaw hanging slack. Just in the wrong place at the wrong time.
“Mmmph – ah! No… My…sister! Sister slut!”
Suki groaned around her tongue, though her words came out muffled as she reached for her twin. The sheer size of their breasts forced them further apart at last, rolls of pleasure aching through them as desire pulsed from their nuts and cocks. They grew taller still, over forty-feet tall and shooting up at a rate that could be seen with the naked eye, yet it was the outward expansion of their bodies that shook the core of the mansion.
It didn’t matter to them, not as they grabbed and ground, using one another’s bodies for their greedy pleasure. It was all they needed, absolutely everything, milk sloshing about within their tits as their skin stretched and strained. Their bodies rumbled with the production of even more muscle and their buttocks rounded out nicely; anyone watching could have described them as the perfect “bubble butts.” It was only the sheer size that set them apart from any other woman, of course, with a body to die for.
“Unff… Gonna…”
Yuki groaned and rocked forward, her hips rising, yet she still kept Suki’s cock inside hers. As cum poured from her, desire flowed, and she knew she had to get there. She had to reach that peak, moment by moment passing outside her jurisdiction, hissing and grunting around the wet slick of her tongue.
Up to fifty-feet tall and higher still, the exact measurements of their height ceased to matter as the mansion ended up looking small under them: the literal toy house that they had grown from. Yet they could not contain their growth as they wobbled and clung to their breasts, seeking a sense of stability where there was none to be found.
They swayed, crunching and cracking through more of the roof and sending tiles tumbling to the ground. Yet they could not remain upright as Yuki teetered more to the right and dragged Suki along with her, the two monstrously grown twins crashing down on their buttocks. Even though they were still joined, of course, they slammed down on their asses as they crushed what remained of the mansion, setting the rest rumbling. It could not possibly stand up to an earthquake quite like that as they slammed down into it, effectively ruining it as their asses made two, huge crater-sized holes in the house itself and the ground it had stood on.
They screamed in unison, finally at that peak that their growth had been promising them all along. Orgasm exploded through them as their cocks jetted off even more cum, sending thick pumps into one another, bloating up their bodies with swollen inflation. It poured mostly into their balls and asses and tits, though sent even more growth still in the rest of their bodies, softening their flesh as their legs grew longer, along with their torsos. Every part of them grew, even though they were awkwardly sitting, pussies gushing with their arousal as they squirted out every drop of pleasure they had to give.
And then darkness overcame the twins, as if they were one in the moment, grunting thickly and their jaws falling slack. They slumped into one another, though their bodies stretched to wobbling, bursting point as they languished there, unable to do another else.
Slowly, however, the stream of orgasm tapered off, their bodies shrinking as they deflated. Down and down and down, their bodies pinched in on themselves, back to their usual sizes, though a pool of bodily fluids surrounded them like a small lake.
The demon, however, could not leave them there, no. They would be discovered and he had only been toying with their bodies, testing out the limits of them – and just how they could smash through those limits like they were boundaries made from matchsticks.
Transporting them back to their house, the demon smirked, its essence flow