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Taking Shape in a New Body

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Written by Arian Mabe (Amethyst Mare)

Commissioned by ChironTheAscendant

_ _

_ _

Charlie sighed, leaning back against his bedroom door, although that didn't help the young stallion relax in the slightest. His white coat gleamed with good health and his body was light and lithe, even though he was wearing a pair of shorts and a loose T-shirt. Everything seemed loose on Charlie, especially considering he was of a much lighter build than most other stallions he knew. Arabian stallions, with a finer build, tended to be like that.

His tail twitched back and forth and his nostrils flared, though there was little Charlie could do to tame what he needed, his body aching deeply. With a grunt, the eighteen-year-old anthro pushed off his bedroom door and strode over to his bed, his black hooves moving fluidly over the carpet. At least he was light in his step, despite his hooves, which was a lot more than could be said for his parents.

Charlie tensed as his father – well, kind of, his adopted father – paced past the bedroom door. He would have heard him even if the big draft horse wasn't whistling jovially to himself, for his stride and step was so heavy, coming down with a big “clunk" of hooves. He sometimes called Darren, his adopted father and guardian, his “Pa," but it didn't feel right. Darren was a friend of his parents' – well, he had been. At least, before they'd died.

It was expected that Darren and Jessica would take him in after his parents had passed in an accident, though he had been old enough to know them and remember then, the memories coming with a flash of pain. It was difficult to consider all that much from that time, the time “before," without confusion and strife swirling inside him, mixing in equal measures. They'd been very, very kind to him, but nothing would match up to the parents he remembered and the irreversible shift in his life.

Things, however, had only become more difficult since he had come of age, turning eighteen and finishing up school. He was supposed to go into further education, but the stallion still didn't know what he really wanted to do – and his mind was not exactly his friend at that time either. Charlie would not have called his mind his own worst enemy, but it certainly pushed things into his conscious thoughts that he really could have done without. Things, really…that made his malehood ache and fill with blood, straining in an urgent rise to attention.

Why am I like this? He thought, lying on his bed with his arm cast over his eyes, as if he could hide away from the world just like that. I shouldn't think of Darren and Jessica like this… But I do. I want them.

_ _

His small shaft plumped up as he lay there, though he was grateful his shorts covered them. Even if he wasn't wearing any underwear beneath his shorts, it made him feel like he was a little more protected, even as his cheeks warmed with lust.

Was it really so bad though, to have thoughts like that? He hadn't, admittedly, thought of Darren and Jessica in such crude, almost rude ways until he had come of age, really, but he would have thought he'd focus more on those around him at school. Heading for higher education, he didn't yet know what he wanted to do with his life, though he thought he might be around others to “warm to" in that way soon.

That didn't stop him wondering what it would be like to run his hands down Darren's wide, muscled frame. The bearded draft horse had a rich bay coat – and it was obvious the two of them weren't related. Not that it had ever mattered, after they'd taken him in, but Charlie used that notion as an important distinction. Even though the draft horse was his guardian, maybe the fact that Darren wasn't really his father made it all okay.

For he would not have just stayed there, rubbing his hands down Darren's muscled chest, all the way to his tight six-pack of abs and thighs. He would have dropped to his knees wantonly, if he'd had the chance, and worshipped the stallion for all he was worth. Not that he honestly had much of an idea of what worshipping was in a sexual context, but it sounded close enough to what he wanted to do to the older stallion.

Squirming on the bed, Charlie whimpered in the back of his throat. Yet he still thought of how good it might feel to let his lips caress the soft shaft of Darren's cock. It had to be a lot bigger than his, for Charlie was a little on the smaller side, but they didn't have sheaths around the base of their dicks like some other anthro species. He preferred it that way and Charlie brushed his lower lip with trembling fingers, wondering how it would feel to have that firm length fully hardening up within his mouth.

It had to be exquisite. He rubbed the back of his hand over his softly swollen shaft, tucked away in his shorts, but didn't make an effort to release it.

Charlie didn't need to, no. Not as Jessica filled his mind, her liver chestnut a different coat colour entirely to his pale coat; there was no way they could ever be the same. She did have something of a lighter hue to her mane, as if there was a hint of something flaxen in it, but it did not differ too much.

Her large breasts were soft, so very soft, when he hugged her – and he caught himself doing it more and more those days. Just to have her against him, his body warming to the heat of her. Sometimes, he glimpsed her coming out of the shower, though she was respectful of him and his space and went straight from the family bathroom to her bedroom, so she was not out and barely covered for long. No matter what bath towels she bought, she just couldn't seem to keep them hitched up under her arms and over her large bosom.

That was why Charlie stared, wanting to feel and see more of her, though there was so much hidden. So, he could only imagine what it might feel like to lie on his back, on one of their beds, and have the mare sit on his shaft, taking his rod deep into a tight, warm pussy. Her folds would tighten on him as he nickered and rocked up against her – but that was all just a fantasy.

Charlie quivered, swallowing hard. His shaft was hard, tenting out his shorts, but he didn't touch it again, not even through the fabric. He just wanted to let the moment pass, his tail trying to twitch where the dock was pinned between his buttocks and the bed.

What would they say if they knew what he was thinking about them, even if his sexual fantasies were kind of light on material? Charlie just didn't have the life experience to consider more, even though he wanted it – definitely. But he couldn't ever tell either of them about it! They'd hate him, maybe even kick him out! They were his guardians, his parents on paper… But there was nothing between them other than a familial relationship. At least when it came to how they treated him and what they thought about him.

“Unff… This is a waste of time," the young stallion huffed, pushing himself up from the bed. “Okay, okay… Come on. Dinner soon."

He had to verbally encourage himself on a bit, getting himself tidied up and a bit more presentable for dinner as a family, though it was still a very strange sort of family. They were family but not family at the same time, but even Charlie had not come to terms with that in his mind. Over the dinner table, he smiled the best he could and made like, polite conversation. But the young stallion couldn't deny that his mind was elsewhere.

Was it really his fault though? Charlie argued with himself as he helped Jessica with the dishes, on autopilot. He was young, he was trying to find his place… Granted, that had been more difficult than anticipated considering he'd lost his parents. Things had been hard, but they were not impossible.

But he couldn't keep going as he was either, tossing and turning every single night, waking up with his cock harder and dripping, sometimes even having ejaculated. That felt wrong, dirty and messy, like it was breathing life into something that should never have truly been given a spell to live.

He could not say, honestly, either way. With his tail clamped down, Charlie concentrated on drying off the dishes, ever aware of Jessica standing close to him. Her mane was braided that day so he could see the arch of her neck, thicker and more muscular than his. Draft horses packed on muscle a lot more easily, yet her draft horse heritage mostly seemed to come through in her bust, although she certainly had other features too, in her Roman nose and similar.

Don't look, don't look…

_ _

He couldn't look, stiffening as Jessica eyed him curiously.

“Charlie, darling," she murmured. “Are you quite alright? You don't seem yourself tonight."

He frozen.

“I… Uh…"

“Nonsense, Jessica, give the colt some space!"

Darren clapped him on his arm, fingers curling around his triceps in a familiar squeeze. He exhaled his held breath in a rush, but that didn't make the moment any easier to bear as he quivered there, suddenly in contact with the older stallion. Cutting in on Jessica's probing before his wife could go any further, Darren smiled more gently at Charlie.

“He'll talk to us if he needs to," Darren said, speaking to both Jessica and Charlie. “You know we're never going to force anything, Charlie. But you can talk to us about anything at all, whether it's your education, friends, or something else entirely."

Charlie gulped.

“Yeah… I know…"

But something had caught his attention, eyes darting to his arm. For the hair there had shifted colour, darkening from his pure white to the rich, brown bay that was exactly the same coat colour Darren had. His eyes widened.

“I…"

He didn't know what to say, something tightening in his chest as his breath wheezed and caught in his fluttering nostrils. The room flickered as his vision blurred, yet Charlie gathered himself swiftly – well, as quickly as he could. His stomach churned, rolling over and over and over, though he had eaten nothing at all that could have upset it.

And then Darren released his shoulder, the darker hair receding back to natural white as if it had never been. Blinking dumbly, Charlie lifted his arm and eyed it suspiciously, his nostrils flaring and puckering back in with a grunting snort.

“Are you sure everything's okay?"

Jessica pressed, even though that was one thing he didn't like all that much about her, being quieter and more reserved. Darren was right to say that he had to come to things in his own time, so he didn't become overwhelmed, though he appreciated everything the couple had done for him too, of course. There were some things, however, he needed time and space to work out before he even considered raising them with the couple. His adopted family.

“Yes, I'm okay," he said, discreetly stretching and flexing his arm. “Just a muscle cramp, think I twisted it funny."

She smiled, accepting that answer – at least for the moment.

“That's good, but let us know if you're hungry at all later, okay? I can whip up something for you, anytime you like."

Smiling, he nodded his thanks, hoping Darren and Jessica didn't notice his coat darkening slightly with sweat, the clean, crisp scent of it in the air. It was a far cry to expect many anthros not to notice things like that, but Charlie could only hope.

What on earth had been that colour change thing? It didn't make sense, but it had felt warm and tingly, like a harmless electrical pulse was coursing through his body from that point of contact. Charlie gulped hard and made haste to retreat to his room, almost tripping over his hooves in the process.

What is going on?

_ _

Yet it was not something any young stallion like Charlie should ever have had to deal with, even if it was something that came with infinite possibilities.

In the privacy of the bathroom, he tried to shake off what had happened, but what had begun could not be undone, no matter how much Charlie may have liked it to be so. Or not, later, as it was. The stallion groaned, clasping the cool edges of the bathroom sink in his hands, fingers curling around the smooth porcelain.

It's nothing, he told himself, meeting his gaze in the mirror as his forelock hung into his eyes. It's nothing at all, nothing to worry about. I'm just imagining things.

_ _

His mind wandered again to Darren and, again, a flickering pulse of warmth soared on his arm. A patch of dark bay hair swept into existence – and, just like that, it was gone again. Leaving one stallion even more confused than he had been before.

Charlie may not have known what was happening, but the equine understood what trial and error was, considering it all an experiment of sort. He touched his arm in the bathroom again, right where Darren had touched him, but the coat colour change didn't flare up again, even though he thought as hard as he could of Darren as possible.

He might have thought it all a ruse, something he shouldn't have allowed to take over his mind so much, if not for finding the hair from Jessica in her brush. It was a good chunk of hair, having shed from her tail while she had been grooming, and he stole some of it, rubbing it thoughtfully between his fingers.

“Hm…"

Charlie hummed lightly, not even thinking of the strange thing that had happened when Darren touched him, but he had to admit his thoughts had been similar. For he'd been thinking of Darren and Jessica then, lust mingling with fear over his secret, and he did the same as he imagined running his fingers through Jessica's long, thickly flowing tail, pushing his nose up slowly under the sweet, velvety dock.

He started as heat flooded his body again, his coat once again darkening – but, that time, it was a liver chestnut, that deeper brown with a hint of flaxen in the mane and tail, that spread through him. Gasping, Charlie staggered back, caught off-guard in the hallway between his bedroom and theirs, though he was fortunate enough that his guardians were out that afternoon. So, they weren't there to see him collapse against the wall, sliding down as his legs shifted, growing a little more muscular and softer around the thighs, almost showing off a more feminine figure. He grabbed at his face and dropped the tail hair, which was the only reason the shift in form paused, slowly receding.

It wasn't possible to change form like that, some kind of shape shifting, and yet Charlie couldn't find a name for what was happening to him. He dug into the local library, embarrassed to be checking out so many books on mythology and changing shape, though there ultimately wasn't anything there that benefitted him. Searching online was not as useful as it had been even a few years ago, the lines between fact and story and lies blurred to the point where useful information was buried. But it wasn't as if he had ever heard of someone who could transform either, not outside fiction.

Regardless, Charlie set his mind to the task of working out what was happening to him and his body, uncovering a few little slivers of information. Finding Jessica's tail hair was an important clue in the mystery, allowing him to tentatively uncover that the change happened when he touched the person he wanted to change into or held some cut hair. It would probably work with other things, potentially such as hoof trimmings, but those didn't tend to stay for long in a clean household.

The key to shifting, however, came with lustful thoughts – the kind of thoughts that brought a horrifyingly delicious rise of heat to his cheeks, as if they were burning. Charlie always thought it had to be frightfully obvious when he was blushing, but no one ever commented on it. Thankfully…

It couldn't be real – and yet it was real. He had tangible proof he could change, holding a scrap of Darren's mane between his fingers and rubbing it back and forth, the hairs separating out between his thumb and forefinger. With a deep breath, the stallion thought of Darren, how hot it would be to spend time with the stallion, maybe even pushing his shaft into the bigger equine's tail hole, feeling the older anthro stretch around him. The changes spread out from his fingers, stretching up his arm as he allowed it to happen, muscle bulging and filling out with both a heaviness and a strength to it he was entirely unfamiliar with. Nothing was the same with him and yet Charlie didn't know how else to contain it as his chest broadened and he let out a throaty nicker that was altogether deeper than any sound he would naturally have made.

I can do it… He thought, heartbeat racing as he heard the big draft stallion clomp down the hallway again, though it was not as if Darren could help how heavy his step was. But I can't let them see what I'm doing, they'll think I'm crazy. I don't want to be kicked out… I don't want anyone knowing how I can change, not with…what I think about.

_ _

He swallowed, a fleshy tongue sweeping out between his lips in a broad, brief lick.

I've got to wait until they're gone… So, I can really see what a whole new body can do.

So, he waited until they were gone one Sunday afternoon, the house entirely to himself, even if it felt too quiet and eerie to be on his own. Charlie brushed that thought aside and stripped down quickly, fingers fumbling in his haste to do so. He pulled up his tank top over his head, ruffling his mane, and finally stepped out of his boxers, standing naked in front of the mirror on his wall.

It didn't look like him in that mirror, even though he was definitely still Charlie with not a touch of darker hair on him at all. He was all lean and, well, almost scrawny, and he swallowed, eyes sliding away. There was nothing bad about how he looked, yet he shoved down the flicker of residual guilt that told him he may have been doing something wrong, that maybe he shouldn't have been pushing so far.

Ah, yet it was hard to manage such things when lust acted as his guide, stirring him up and urging him on.

His chest rose and fell sharply with breath and Charlie took a deeper one so it did not quite rake through his windpipe as much. He couldn't deny his own excitement for what was about to happen, warmth pooling at his core and seemingly dripping lower, adding a touch of fuel to his groin. At that time, his cock remained soft, hanging down from his crotch lightly, but Charlie did not at all expect that to be the case for long.

“I want to see…" He breathed, eyes narrowing faintly with a sense of resolution he had not felt in himself for years. “There's more to me than I thought."

That was enough for him to dip tenaciously back into his lustful thoughts, naked in his room and imagining nuzzling against Darren's cock, coaxing it to full hardness with his lips and tongue. Of course, Charlie still would not have quite known at all what he was doing with a stallion like him, but it was his imagination and the only catalyst required there was arousal.

He allowed his mind to wander, wanting to deepen that arousal. How would it feel to fold his hand around Darren's thick shaft, to feel that medial ring and slide his hand up and down the studly length? He let out an involuntary nicker, glad that he was alone, although Charlie had little to worry about there. His daydreams and fantasies were for him and him alone, even if the progression of them that day was more important than ever.

In his mind's eye, his fingers moved smoothly over the fat bump of Darren's medial ring, pushing his own hips insistently forward so he could lay his length against the draft stallion's. There would be a considerable size difference there where it came to their lengths, but that didn't worry Charlie.

He let out a small grunt as he rolled his hips, brushing his own dick with his hand again, but imagining that he was rubbing and grinding up against Darren's cock. Would the other stallion reach for him and pull him closer, maybe? Or would he rock his hips and let the lust of his body speak for him, passion controlling all as their cocks frotted one another? He could see Darren taking charge with a smile, holding their cocks together with a skilled, practised hand as he let Charlie grind against him, following his own needs. Charlie, however, would not be able to stand up to the virility of the stallion, as much as that more lustful part of him may have wanted to. Oh, how he longed to…

But he had more to do, letting the image remain in the forefront of his mind of his hands roaming Darren's body, squeezing his biceps and triceps, sliding across his chest to grope his pecs. With muscle like that, who would not want to become a stallion just like Darren? Charlie took a deep breath, attempting to steady himself, though his tail still lashed with raw need. With a shaking hand, he unfolded an old, cloth handkerchief (it was a keepsake, something from his parents), exposing a chunk of black mane hair from Darren.

He held it carefully between his fingers, shifting his weight a little anxiously from hoof to hoof, even if he had held the transformation for some time already before. Each time, he wondered if it was all in his head, if the warm sweep of change was not going to come for him that time; each time, he was proven wrong in his doubts.

Charlie nickered as warmth seeped through him, tickling his throat and making him shake as he suddenly felt out of place in his small, lean form. It always caught him a bit unawares, but he naturally spread his hooves apart a little further as a bay coat tickled into existence over him, as if an artist's brush was dyeing him right then and there. His mane puffed up, thicker and coarser, and he panted more heavily through flared nostrils, wheezing a little as he dragged in air through a changing windpipe and expanding set of lungs.

His shoulders rounded, bulking up with muscle that came with a strange “layering" sensation to it, like he was wearing several articles of clothing, thick, winter coats, at once, all pulling too tightly around his shoulders and under his arms. Grunting, Charlie strove to shake off that feeling, letting the changes ripple through him.

Mostly, he grew evenly, though the crackling, crunching sensation of his bones adjusting themselves and growing always made him shudder bodily. It felt like something was wrong, especially when the reverberations rocked up his spine to where it connected at the back of his skull. No, no… That wasn't a part he wanted to focus on.

Better to turn his hands over in front of him, eyeing up how even the hoof-like, chunky nails grew thicker to match the hands shifting there, the dark hair coating them completely even while he retained his dexterity. The forearms swelled faintly, but there was not too much more muscle to add there – more definition that Charlie certainly appreciated. His vantage point over his bedroom shifted, feeling off-balance and bracing himself once more as he grew in height, coming up, slowly, to the same height as Darren.

Darren should have been a foot taller than him, but Charlie blinked slowly, feeling more secure at the same height as the draft stallion – the draft stallion he was becoming. He kept that nip of dark hair clutched tightly in his hand, allowing the transformation to play out, his thoughts flickering between Darren, his body, and exactly what was happening with the transformation.

It was so much more masculine, his chest broadening and filling out with muscle, though he did not remain anywhere near as lean as he had started off. He nickered deeply, ducking his chin briefly, yet the stallion could not stay fast as the proud arch of his neck grew, a masculine rise of fat filling out along the back of it. It gave more shape to him and he resisted the urge to touch his cock, even if that would have perfectly sealed the moment for him.

Charlie had to let it all come, even as his balls grew heavier and heavier, feeling like they were much too large for his body – but all came right, exactly as it was meant to. He licked his lips without thinking about what he was doing, but even those felt different: larger and almost with a rubbery pull to them that had not been present before. Even though he didn't need to see specifically, he made himself watch, once again, in the mirror as his abdominals grew firm, each muscle defined from the stallion's level of physical fitness. Draft horses sometimes carried a little extra fat and weight on them, though all that seemed to have been fed into Darren's muscles, from the bulge of his biceps to the thick thighs like tree trunks.

He laid his hands down, the side of his little fingers brushing those abs, the hair a little rougher there too than he'd been expecting. He'd never taken in a full change just like that before, letting it sweep through him slowly as he snorted, eyeing up his more muscular, more masculine form as if he was truly seeing himself for the first time. Charlie's tail flagged and his cock pulsed, thickening up with need and desire, though it was longer than before.

“Unff…"

He stared at himself, Darren's growing body, in the mirror, licking his lips as his heavy cock tried to pull down, but could not be denied its flow of arousal. He shifted his weight as his thighs bulked up, growing thicker around like tree trunks, but he could feel the power in them even with the smallest, subtlest shift in his weight. It was as if it was resting there, waiting for him to be ready to use it.

He wished he had that in his body as Charlie, but none of that mattered right then and there. All he had to think about was how good it felt, grunting as his own reflection as he greedily drank in the sight of his biceps and triceps growing more, rounding out and settling into place on his arms. There was a pull of skin and a strain to be had there as they grew, but everything stretched into place as they were meant to be, warmth pouring over every sore spot the moment his mind registered it.

The stallion, however, had a lot more hair on him than the light-haired Charlie did – and that was something the transform had to account for too. It grew thicker across his chest and he slowly brought his free hand up to stroke through it, letting it poke through his fingers as the hairs grew longer and denser overall.

“Oof…"

He shuddered. It was no wonder why Darren was always as warm as he was, for the denser layer of hair kept him warmer, sweating a little. Darker patches dampened under his arms and around his groin, though there was little Charlie could do about that if he didn't want to open a window. Instead, he groaned in the back of his throat, making odd, huffing sounds, as he stared wantonly at his new, throbbing cock.

He'd never seen Darren's cock before – he'd been imagining his best guess when fantasising, of course – but it was a beauty. It was a wonder that the transformation could draw on such desire when his need was such, but the thick, meaty length practically begged attention. As heated arousal flowed through him, the likes of which he had never honestly even felt before, his cock twitched, bobbing and pulsing under its own volition, a gleam of pre-cum gathering at the tip. Under Charlie's rapt attention, it spilt down to the carpet in a long, sticky string, remaining connected to the head of his huge member as if it didn't yet want to part from him.

Every part of his body had to come into play as he changed from a feminine stallion, barely even such, to a heavily muscled draft horse. He rolled his head sensationally from one shoulder to the other, relishing in the smooth glide and pull of muscles in his neck; they weren't even something he would have taken notice of before. His rich, bay coat gleamed with good health, and he played his free hand over his cock, though it seemed to have grown to its full length. It was easily twice if not three times the length his cock had been and far thicker around. Why, he didn't think he could have closed his fingers around it if they had still been “Charlie's" fingers.

But that didn't matter as increased testosterone flooded his body, cock twitching in response as he pawed over his pecs and swept a hand down his side, feeling the stronger, firmer oblique muscles there. Everything came into play and, what he didn't have the presence of mind to feel up with his hand, he adored with his eyes, drinking in his studly, masculine form with a mind that was on nothing more than a single track.

His hairy chest puffed out a little more, though there was a limit to such and he groaned as the weight of transformation settled over him. It felt like it was over, but he still took the time to check himself out in the mirror fully, turning his body to take in every angle.

He was better and greater than he could ever have dreamed of, sucking in needy, puffing pants of breath as if he no longer possessed the ability to breathe in any other manner. The stallion's tail flicked and he caught the thicker spill of hair there. It even felt heavier to lift with the muscle of his dock, but that was not necessary, not all that much. The glossy sheen of the hair, however, rang with the semblance of good health and he eyed up the muscled glutes Darren had, where there was very little extra fat on his entire body. With his abs feeling as hard as a rock, there was little on his body, including his thighs and ass too, that had any softness on his body at all.

“Mmm…"

He groaned eagerly to himself, yet didn't trust himself to speak. That was one of the strangest things about the transformations: hearing someone else's voice come from “his" lips, even if it didn't feel like him or his body anymore. One thing he hadn't taken stock of during the transformation was his new facial hair and he met his own gaze briefly in the mirror, Darren's older muzzle looking back at him, mane peppered with grey. His beard was no different and Charlie stifled a low chuckle as he brushed his fingers over it, wanting to spare the time to take in every last bit of his transformation.

Continued in part two of two.