Monstrous Inflation: Ch. 01

All work is fiction intended for fantasy only, regardless of content, and consent must always be acquired when engaging in any sex act with another adult.

Please note that all characters are clearly over eighteen and written as such in all stories.

---

Kevin smirked, tipping his head back as he downed first one and then two bottles of the glowing, blue liquid, though they were flatter than he'd expected. Kevin could have sworn he'd seen bubbles dancing about in the bottles back when he'd lifted them from the lab where he worked.

It fizzed as it went down, popping on his tongue like that special kind of popping candy that always made him feel like his brain was crackling. It even tasted ever so faintly of raspberries -- like in that cheap, blue slush that he had liked so much when he'd been a kid. Kevin giggled, a little high-pitched, and hiccupped as he took a swig of the last, upending the bottle so that every drop slid down his throat. Under his fingers, the plastic bottle crinkled, the liquid sloshing as it raced its way down to his stomach.

It didn't matter, however, not all that much, as he was confident he wouldn't get caught for doing so. He worked in the disposal department, more often than not, though that usually meant that what passed through his hands simply wasn't up to scratch for quality control. When it came to energy drinks and the like, well...there were pretty high standards. Which, to be fair, had surprised Kevin back when he'd started there.

"Ah..."

Kevin gave a soft sound of satisfaction, lips parted, as he leaned back against the wall of the laundry room, casting his eyes around the bare walls. Like most laundry rooms in apartment blocks, that one being ten storeys high, they didn't really have any need to decorate it, simply filling it with the equipment required and keeping it as clean as was needed. Yet Kevin always felt the chill in there as he eyed the bare brickwork with a shake of his head.

As usual, the shelves were mostly empty, though he wouldn't have kept things down there, to be fair, if he'd not most usually kept them in his apartment. Things got stolen quite readily if they were left down there for too long, though there was a single stack of what looked like bedsheets and also some assorted bottles of laundry detergent. One of them may have been fabric conditioner, though it wasn't really all that important.

Kevin, after all, was merely killing time as he leaned back and watched his clothes spin around and around the washing machine, trying to track their movement with his eyes. He grunted, a little dizzy, and shook his head, his stomach lurching. It churned and bubbled, just like those bubbles had on his tongue, and he grunted in the back of his throat, his vision wavering and blurring at the edges. Blinking several times, he tried to clear his head, though that only increased the swathe of fog pulling into his mind.

"Urf... Well, ah, I didn't expect that."

The liquid, whatever it was, didn't seem to settle in his stomach all that well, his guts churning and gurgling as if he was about to belch. It wasn't such a bad thing, not really, and he didn't feel all that uncomfortable; he was only uncomfortable enough to notice it, the gurgling and popping of bubbles in his stomach encouraging him to shift his weight and move about a little.

The rattle of footsteps on the old, wooden steps down to the basement caught his attention, though he pressed his hand to his stomach. Rather than any soft layer of fat, though he was more on the scrawnier side, he found hard abdominal muscles, his body rumbling, as if there was a string of vibration just under his skin.

Kevin groaned, though it was hard for him to understand what was going on, even as his line of sight rose higher and higher, though only by a foot or so. He rolled his head, turning to lean heavily into the wall, ignorant to how one of the bricks cracked and almost splintered under his sudden grip.

For the five-foot-tall man was no longer just that, no, not as his body filled out with muscle, smoothing down his shoulders as they rounded out, pushing against his T-shirt. It tore under the arms, thankfully not all that much of an issue for him, staggering a little and slumping against the washer-drier on the far right. He gasped for breath, lungs heaving, though his chest seemed to push out a little more with every gulp of air.

What... This wasn't supposed to happen...was it?

Kevin had wanted to get bigger and stronger, though he had not anticipated such a swift reaction. Alas, that was exactly why the sports drink had been discontinued in the first place, for it had been far too volatile to send out beyond the initial ring of testers. Yet he was not to know that, as he was nowhere near high enough up in the hierarchy of the company to be privy to such information.

He'd just not wanted to waste it and get to bulk up a bit: was that so wrong? Yet there was only so much Kevin could do as he groaned, his chest swelling against the T-shirt and straining it tauter. It dug into his underarms as his muscles bulged, his defined pecs showing through what he would have considered rather high-quality fabric beforehand.

Maybe he was wrong. Yet that ceased to have any meaning as his jeans struggled with his thighs. He muttered under his breath, working his jaw, though all that came from his lips was a wet kind of gargle as he blinked dully. Every fibre of his being was overtaken with the need to control himself, to transform, even though it was very much an unwilling transformation.

"Ungh... Mmmnnn..."

He groaned, though someone on the stairs paused as his body expanded, his shirt pulling up to expose his abs, his brown hair even growing a little thicker and more luscious than before. It curled lightly, flicking down around his ears, falling perfectly even though, of course, he had not had half a chance to style it. His jaw cracked lightly, sending a resounding pulse through his skull, though the end effect of it becoming wider and more masculine still would be well worth it.

Well, if Kevin had been able to recognise himself in the mirror and see what he was, who he was. His mind wasn't exactly keeping up with the ripping, twisting changes in his body, stealing energy from vital processes simply to fuel the transformation. Energy, after all, had to come from somewhere.

Yet he was different and never again would he be the same, a dimple forming at the corner of his lips on the right, hunching forward with a rasping moan. His eyelashes fluttered, letting beads of moisture slip free as the strain of mutation showed up in that manner of strain too. Yet there was only the frustration of his body showing through in tears, shedding for the sense of self Kevin would never regain.

Even Kevin would not have looked twice at himself before, just the kind of guy who blended into the crowd, but he didn't see himself in a bad light. If he'd had a mirror in front of him at that moment, he would have seen himself very differently, standing at six feet tall, ripped and muscled like a professional athlete. Yet he struggled to think of anything like that as he huffed and grunted, the gargle of air being dragged into his lungs aching deeper than any breath had ever before.

What the... What's happening to me?

Kevin tried to draw on his thoughts, although they came thickly and sluggishly in his mind, as if it took a great effort of will merely to think anything at all. He licked his lips, yet his body was warmer than before too, the hint of saliva evaporating near enough instantly from his lips.

His mind glimmered, straining and fighting to come back to himself -- but he may as well have been wallowing his way through quicksand for all the good it did.

This can't be happening, he thought desperately, pushing himself back as he staggered, his knees aching, bones feeling oddly longer than they had before. This all really can't be happening, none of it... Fuck, oh, fuck, what did I take?

It couldn't have been something from the energy drink line, no, not if it was affecting him like that, although there was no way at all for him to tell. It all happened so quickly and he heaved, leaning on top of a washer-drier for balance, even if the only part of him that didn't seem to have grown was his feet. So, at least his shoes were still on, the old trainers that were scuffed but still so very comfortable.

The rest of him, well... His jeans snagged on his thighs, so tight that he could not have really bent his leg if he wanted to. The jeans came down above his ankle, having gained a good few inches in height -- though it was not as if that had only been to his legs. With his jeans and underwear swallowing in crudely between his thighs, his package strained brutally to be on full display, making a huge yet tight bulge. His shirt had pulled up too, exposing his abs, though that was not entirely a bad thing. Even then, Kevin smirked a little, enjoying the sense of weight in his new body, an easy strength that he ached to use.

In a way, he would get to use it, but not quite in the way he'd want.

"Kevin!"

Finally, his neighbour, Natalia entered the laundry room, a full basket of dirty laundry in her arms. For a moment, their eyes locked, but Kevin could not help his eyes raking down over her body, from head to toe.

The two of them, well... They'd had a couple of one-night-stands, usually when they'd been hanging out drinking together, just as friends. Maybe someone would have considered them friends with benefits, though that would have been speculation, for their relationship, in the conventional sense, was never set to progress beyond that point.

Simply put, they'd never have the chance.

Yet Kevin enjoyed looking at her, appreciating her quick wit and intelligent mind too. He could hold a conversation with her and they had a couple of things in common, like the casual games they both played. He was more of a serious gamer in his off-time, however, diving into shooters more often than not. Those weren't Natalia's thing, though they had more than enough to talk about regardless.

Her long, blonde hair fell down to her backside, even if it surely took an awful lot of time for her to keep it as smooth and as sleek as it was. She didn't quite have an even hourglass figure, a little heavier on the bottom half than the top with her wide hips and thick thighs. Her breasts, however, were perhaps a little smaller than her head each.

Before, she'd stood as tall as him, but Kevin found himself looking down at her, blinking as confusion rang through him. It didn't make sense, but he wasn't really in his own mind as the beat of his heart drummed frantically against his eardrums, breath raking through his windpipe, even if it didn't honestly seem to ease the tension in his lungs.

There wasn't anything at all that could ease that tension, no, not as strain bristled through him and, without thinking, he lunged for Natalia.

Her eyes widened and she dropped the laundry basket as she staggered back, clothes spilling across the floor. She reached for him, not realising what was happening, and, frankly, he didn't even know what was happening himself. Not as his cock swelled, his hard-on suddenly pushing out, punching a hole in the front of his jeans.

That in itself should never have been possible as his jeans pulled around his thicker, more muscular thighs, yet the strangled cry that tore itself from his throat didn't have any place there either.

"Kevin! Are you okay? Why do you look so different? What's going on? Kevin -- you're hurting me!"

Natalia held his arm, even as she buckled away from him, some instinctive part of her mind reacting to what was going on, regardless of anything else. She gasped, sucking in a sharp intake of breath, but he was there and upon her, looming as he grabbed her by the arms and forced her down.

Her concern slipped into the back of her mind as Kevin shoved her to her knees, Natalia registering the dull thud of her knees connecting with the concrete laundry room floor. The benches, set in the middle of the room, were to her left, but there was no way for her even to register them in the slightest when his cock jammed its way into her mouth.

With her eyes wide and strained, she gagged on his dick, drooling instantly, saliva slicking down his length. She tried to bring her hands up, pushing at the front of his thighs, but nothing was going to get through to Kevin, not when he was in that state of mind.

All she knew was the thickness of his meat shoving its way into her mouth, squashing her tongue into the base of her mouth, between the twin lines of her teeth. Natalia hacked and gagged on it, her ears watering, though no amount of pushing and shoving at his thighs was about to get the man off her.

He'd never been like that before! With her, he hadn't been the best at sex, that was true, but it wasn't as if he had been bad either. He hadn't been crude and he hadn't been rough -- he'd just been, well, Kevin.

"Unff!"

She grunted around his cock, drooling thickly, her hands closing into weak fists to beat at his thighs. Above her, she wasn't privy to how he gaped, ramming his dick ruthlessly into the back of her throat as she gagged viciously on his cock, her chest heaving.

And yet...Kevin didn't seem to be in any state of mind at all, not one that should ever have belonged to him, not in any way. He grunted and heaved, licking his lips, though appeared slightly slack-jawed as he shook himself, returning to some sense of his own reality.

"Agh!" He shouted, trying to pull himself away, but that only led to him thrusting harder, grinding his cock into the back of her throat with sheer, raw force. "Natalia -- ah! I can explain! Oh, shit!"

He grunted, eyes half-closed for a moment, thrusting harder, his hands, somehow, on her head, fingers tangled into her hair. As the frantic nature of the moment sunk into him, like he was being dragged to another dimension, he gripped her hair, a strangled cry gargling in his throat while Kevin sought words.

"Natalia... Natalia... I'm sorry, I'm so sorry!" He raised his voice until his throat ran raw, as if he could make himself heard if only he was loud enough about it. "Please... Mmmph... Oh, fuck, your mouth feels good... No! Hell, I'm trying to stop, really, I promise I'm trying!"

He was, in fact, trying to stop, though fighting didn't seem to do him any good at all as his body churned with an ache he was not familiar with in the slightest. Kevin huffed and panted, his throat tightening, though even he could not have anticipated the horror that was to come there.

Natalia hacked and gagged on his cock, her eyes streaming with moisture. She couldn't take a cock like that, no, it was big, much too big. How did Kevin even have a dick that big anyway? It wasn't all that much bigger than what he'd naturally been packing when they'd hooked up before, but Natalia was still enough in her right mind to tell that all was not as it should have been.

She couldn't take it and yet something surged within her, as if there was something inside her body that, in a way, was responding to Kevin and everything his body cried out for, with her and only her. She drooled around his cock, saliva gleaming at the corner of her lips, though her fingers somehow managed to hook into the waistband of his jeans, even though there were splits tearing down the seams where his clothes could no longer contain him.

Maybe nothing had ever been meant to contain him...

Her breasts bobbed in her tight T-shirt, her bra not keeping them under control as he hung on to her hair, viciously tight, dragging her head back and forth. It was Kevin forcing her up and down on the length of his cock that made her tits bounce like that, though it was far too late for even Natalia to wish she'd worn a bra that offered her a little more support. In that sense, there was only so much that could be done.

Did it really matter with everything that was happening? She gulped around his cock, trying to make it easier for her, pushing against his thighs, though her fingers came up against tight, firm muscle. Of course, Kevin had some muscle on him before, though it had all changed, which was why she'd been so worried when she'd seen the shadows in the laundry room changing when she'd come down the stairs.

Pausing there, on the wooden steps, she'd watched a shadow grow bigger, cast across the wall, a humanoid figure jerking around as the air crackled and fizzed with a near enough burning energy. It was as if there was something charred there, though not electrical, and she'd almost backed away until she'd heard his groan.

After the nights they'd spent together and the laughs they'd shared, she would have recognised him anywhere. At least, that was what she thought, even if things were not as simple as all that. She murmured around his cock, a strained tear rolling down her cheek, though her lips stretched wide around the girth of his cock.

Natalia had to hold on, had to bear through it. She closed her eyes, a tear glistening on her eyelashes, though something that delicate was not hers to hold. Natalia grunted, the dull sawing of his cock raking back and forth over her lips, rendering them blistered and sore -- though that was something, for her, that would have no long-term effects. How could it?

He fucked her ruthlessly and, frankly, Natalia might have liked it if not for it coming up so unexpectedly. There was too much going on all at once for her to make either heads or tails of everything, trying to grunt around his cock. With his shaft muffling her mouth, no sound at all came out, and she hooked a finger into the empty belt loop on his jeans, holding herself there, even as her heart hammered.

"Mmph... Ngghhh..."

She groaned around his cock, her fingers fluttering weakly against his thighs. She hadn't noticed just how ripped his clothes were when she'd walked it, more overtaken by the change in his physique, though it was impossible to miss as she swept her hands down the outside of his legs. What had happened there? Had he been caught by something, or had an accident?

Yet it didn't matter, not as Natalia strained away from him, her heart pounding, stomach flip-flopping sickeningly. She didn't feel at all set in her own body as she struggled to pinch the backs of his knees, groping and squeezing. If she caught the right point, maybe she'd be able to push him off her.

It was a faint hope, however, and not one that had any place in her mind, not when everything had already spiralled so very far out of her control. It had never been in her control at all, not as she was hauled back and forth on his dick, like a sex toy for him to play with.

"Natalia... I'm sorry... I'm really...mmph...sorry..."

Kevin couldn't get out a full sentence without groaning, panting through an open-mouth, eyes half-closed as if he didn't possess the energy to do anything in the slightest. Yet his hips kept pumping and pumping, his jeans splitting down between his ass cheeks, even if the breath of air tickling his increasingly bared skin was not even caught by his mind.

There wasn't anything there for his mind to linger on, not as his cock throbbed within the delicious heat of her mouth. Her tongue had been flattened into the base of her mouth and he crammed his length over it repeatedly, forgetting her comfort. Or, rather, his body didn't consider her comfort in the slightest as he thrust, ramming into her mouth with single-minded determination, his mind and body in conflict with one another.

"Natalia... Sorry... Really sorry..."

He huffed, cheeks puffing out with air. Tensing his abs, he pulled back, putting every ounce of energy he had in him into pulling back, his back hunched forward as his hips trembled with the force it took to draw away. He groaned, long and low, but it was futile either way as the next spear back into her wet mouth brought with it the delirious rush of orgasm.