Cover of Gemma

5 chapters · 18117 words · Read 0 times

Gemma wakes one morning to find she now has a small 2 inch cock. Cumming makes it grow. Her college roommate, Daisy, is enthralled and loves to play with it. Can Gemma resist the growing harem around her before her cock gets too big?

Chapter 1: The Morning Surprise & Daisy's Curiosity

The itch started around three a.m., a deep, insistent pulse that woke Gemma from a dead sleep. She’d been dreaming of tangled roots and tight spaces. She fumbled under the covers, half-asleep, mind foggy with the residue of cheap pizza and medieval lit. Her fingers brushed against something warm. Solid. Completely, unequivocally there.

She snatched her hand back.

The dorm room was dark, split by the neon glow of Daisy’s laptop charger. Gemma lay perfectly still, holding her breath. The thrum of the building’s pipes, the distant bassline from a party down the hall—it all felt suddenly miles away. Her heart was a frantic bird in her ribs.

Slowly, so slowly, she slid her hand back down. The fabric of her cotton shorts was stretched taut. She traced the shape beneath it. Long. Smooth. Unmistakable.

“No,” she whispered to the dark. The word evaporated into the scent of Daisy’s vanilla-coconut perfume and stale laundry.

She threw the covers off and bolted upright, scrambling for her phone. The screen’s light was a brutal shock. She angled it downward, shoved the waistband of her shorts aside, and looked.

She didn’t scream. The sound that came out was a choked, breathy yelp, like she’d been punched in the gut.

It was a penis. A fully-formed, utterly real, albeit currently flaccid, penis. It was just… there. Attached. Hers.

“Gem? You okay?” Daisy’s voice was a sleep-thickened murmur from across the room. “You sound like you stepped on a Lego.”

“Daisy.”

The weight in that single word had Daisy sitting up. Her silhouette was a messy cloud of dark hair. “What’s wrong? Bug?”

“Turn on your light.”

The click of the lamp was apocalyptic. Daisy blinked, her eyes adjusting. Gemma was sitting rigidly on the edge of her bed, knees clamped together, face the color of chalk. She was staring straight ahead at the poster of Tolkien’s map of Middle-earth, as if it might offer sanctuary.

“Gemma, look at me. Did you throw up? You’re green.”

“I didn’t throw up.” Gemma’s voice was terrifyingly calm. “Something… happened.”

“Did you get your period on your good sheets? Because I told you, the red ones hide–”

“It’s not my period, Daisy.” Gemma finally moved, swiveling her head to meet her roommate’s concerned gaze. Her expression was one of sheer, unadulterated panic held together by a thread of wry disbelief. “I think… I think I’ve grown a dick.”

Silence. A full five seconds of it, broken only by the hum of the mini-fridge. Daisy’s eyebrows performed a slow, skeptical climb. “Okay. Like, metaphorically? Because Jared from your linguistics class is a total–”

“No. Not metaphorically.” Gemma’s control snapped. “Literally! A literal, bodily, flesh-and-blood penis! Just… sprouted! Overnight!”

She threw her hands up, then immediately clutched the comforter to her lap again.

Daisy was out of her bed in a flash, her neon pink tank top riding up. She didn’t approach like someone confronting a biohazard. She crept forward with the focused curiosity of an art historian approaching a newly discovered fresco. “Can I see?”

“What? No!”

“Why not? I’ve seen yours before. Well, the old configuration. This is just an… update.” Daisy knelt on the worn carpet, resting her chin on her hands on the edge of Gemma’s mattress. Her eyes were wide, sparkling with pure, unadulterated fascination. “Come on. This is literally the most interesting thing that has ever happened in this room. Probably in this entire building. Please?”

Gemma stared down at her. Daisy’s expression held no revulsion, no fear. Just eager, scientific hunger. It was this, more than anything, that made the surreal feel marginally manageable. Her best friend wasn’t running for the door. She was asking for a showing.

“It’s weird,” Gemma muttered, the fight seeping out of her.

“Obviously it’s weird. It’s magic, or a mutation, or alien spores. We’ll Google it later. Right now, I need data.” Daisy reached out a single finger, hovering questioningly over the blanket. “May I?”

Gemma gave a tiny, jerky nod.

Daisy peeled the comforter back gently. She looked. She didn’t gasp or laugh. She tilted her head. “Huh.”

“’Huh’? That’s your professional analysis?”

“Well, it looks… normal. Healthy. Nice color.” She pursed her lips. “Do you feel it? Like, is it connected to your nerves and everything?”

“I feel it,” Gemma said dryly. “It’s rather difficult to ignore.”

“Can you move it?”

“Move it? It’s not a toy, Daisy. It’s an unauthorized anatomical addition!”

“Just try. Think about moving it.”

Gemma focused, her brow furrowed. Nothing happened. It just lay there, an inert foreign object. “No. I have no idea how. It’s like trying to wiggle a third ear.”

Daisy sat back on her heels, thinking. The dorm room felt smaller, the air thicker. The clutter of their shared life—Daisy’s charcoal sketches pinned to the wall, Gemma’s tower of novels, the half-finished bag of tortilla chips—seemed to recede, leaving only this one impossible fact in the center of the room.

“Okay,” Daisy said, her tone shifting to something more practical. “So it’s there. It’s attached. It’s real. But it’s not under your motor control. Yet.” A slow, mischievous smile spread across her face. “I wonder what does control it.”

Gemma knew where this was going. “Daisy, no.”

“Gemma, yes! How are we supposed to understand the rules if we don’t test the parameters? This is basic scientific method.” She leaned in again, her voice dropping to a conspiratorial whisper. “Just… think about something sexy.”

“I’m currently preoccupied with existential dread and the potential collapse of my entire identity. I’m not really in the mood.”

“Then let me help.” Before Gemma could protest, Daisy’s fingers, cool and sure, brushed against the skin of Gemma’s inner thigh.

Gemma jolted. “Hey!”

“Relax. I’m not touching it. I’m just… setting the scene.” Daisy’s touch was light, tracing idle patterns. “Remember that TA from the summer film course? The one with the forearms and the knowing smile?”

“This is ridiculous,” Gemma breathed, but the protest was weak. A strange warmth was pooling in her abdomen, unfamiliar but undeniable. It was a direct line, a circuit being completed that she never knew existed.

“Think about his hands,” Daisy murmured, her artist’s eyes fixed not on Gemma’s face, but lower. “On the steering wheel of his car. Or holding a pint glass. Competent hands.”

Gemma shut her eyes. She didn’t want to think about the TA. She wanted to think about the bewildering fact of her own body. But the sensation Daisy was conjuring was insistent, a physical echo to the mental image. The warmth intensified, became a low, magnetic thrum.

She felt it then—a subtle shift. A thickening. A gentle, inexorable lift.

“Whoa,” Daisy whispered, her fingers going still.

Gemma looked down.

It was changing. Filling. Becoming erect, right there in the open air of their shabby dorm room, under Daisy’s utterly captivated gaze. There was no blush, no stammering confession. It just happened, a smooth and silent transformation that felt both deeply private and shockingly public. It was hers, yet it was performing on its own, a magic trick she didn’t know how she’d done.

The two young women stared, motionless. The only sound was their shared, shallow breathing.

Daisy finally broke the silence, her voice full of awe. “Okay. So that’s how that works.”

Gemma couldn’t speak. She was caught between a profound, body-deep embarrassment and a staggering, dizzying surge of power. This thing was responsive. It was connected. It was, for better or worse, a part of her now.

She reached a trembling hand down, not to cover it, but to touch. To finally, truly feel the reality of it. Her fingertips made contact.

The sensation was electric, a jolt that raced up her spine and short-circuited every thought in her head. It wasn't just touch. It was a conversation her nerves were suddenly fluent in.

She pulled her hand back as if burned, her wide eyes meeting Daisy’s.

The night outside their window was still dark, holding its breath. The rest of the world, with all its normal rules and expectations, waited beyond their door. But in here, everything had changed. The chapter was over, but the story, wild and uncharted, had just violently, undeniably begun.

The chapter was over, but the story, wild and uncharted, had just violently, undeniably begun.

The electric jolt of her own touch faded into a buzzing numbness in Gemma’s fingertips. She stared at Daisy, whose expression had shifted from awe to a kind of focused determination.

“Okay,” Daisy said softly, more to herself than to Gemma. “Responsive to tactile stimulus.Check. Connected to… whatever passes for your libido now. Check.” She chewed her bottom lip. “We should establish a baseline.”

“A baseline?” Gemma’s voice was hoarse.

“For function. For… capacity.” Daisy’s eyes, in the lamplight, were all pupil. She didn’t wait for permission. Her hand, which had been resting on Gemma’s thigh, moved with deliberate slowness.

Gemma flinched, a sharp intake of breath hissing through her teeth. “Daisy, wait—”

But Daisy’s fingers were already there. Not tentative, not clinical. They closed around her, the touch firm and inescapable. Gemma’s protest died in her throat, replaced by a stunned silence. The warmth of Daisy’s hand was a shocking contrast to the cool dorm room air. It was real.This was happening.

Daisy examined her closely, tilting her head. “It’s… kinda cute, Gem,” she said, a genuine note of appraisal in her voice. “Petite. Not what you’d expect from the whole ‘magical transformation’ package, you know? More of a… specialty model.”

A hot wave of something—embarrassment, indignation, weird pride—flushed through Gemma. She was hard, completely erect from Daisy’s earlier teasing, and yet, according to her roommate, unimpressive. The contradiction was dizzying.

Daisy began to move her hand, a slow, experimental stroke. Her thumb and index finger formed a loose ring, moving from base to tip with a gentle, curious friction. It was a clinical motion, utterly devoid of the passion Gemma might have imagined in a thousand silent, book-fueled daydreams. This was dissection. This was data collection.

And yet.

A feeling, low and insistent, began to uncoil deep in Gemma’s gut. It was unfamiliar, a direct line of pleasure that bypassed her brain entirely and spoke straight to her spine. It was nothing like anything she’d felt before. It was sharper, more localized, a tightening coil of pressure building inexorably at her core. She was a spectator in her own body, watching with detached horror and fascination as Daisy’s casual, almost academic ministrations stoked a fire she didn’t know how to control.

“I… I don’t…” Gemma stammered, but her hips gave a tiny, involuntary jerk.

“Shhh,” Daisy murmured, her focus absolute. “Just observe. Note the sensory feedback.”

Gemma’s hands clenched in the threadbare blanket. She couldn’t look away from the sight of Daisy’s hand moving on her. It was obscene. It was fascinating. It was the most intensely real thing that had ever happened to her. The coil wound tighter, and tighter. Her breath came in short, shallow gasps. The world narrowed to the circle of lamplight, the smell of vanilla and dust, the soft sound of skin on skin.

The climax, when it arrived, was not a wave but a short, sharp release. It was pathetic, really. A weak, shuddering pulse of sensation that left her gasping. Two small, clear spurts spilled over Daisy’s fingers and onto Gemma’s own stomach, a damp, warm proof of function.

The feeling evaporated as quickly as it had come, leaving a hollow, throbbing emptiness. Gemma went limp, slumping back against her pillow, utterly spent. The thing between her legs was already softening, retreating, becoming just a strange, flaccid appendage once more.

Daisy pulled her hand back, examining her glistening fingertips with a botanist’s interest.“Hmm. Productive. Good viscosity.” She looked at Gemma, whose chest was still heaving. “So? Subjective report?”

Gemma stared at the ceiling, at a familiar water stain shaped like Italy. The physical relief was immense, but it was tangled with a deep, profound weirdness. She felt hollowed out and reconfigured. She slowly lifted her head, looking down at herself again.

A frown creased her brow. She blinked, trying to clear the post-coital fog.

“I think…” she started, her voice a rasp.She swallowed. “I think it’s bigger.”

Daisy’s head snapped up from where she’d been vaguely wiping her hand on the edge of the pizza box. “What?”

“Not a lot. Just… a little. It looks… different than it did before. Before you… you know.” Gemma’s mind, her literature-trained mind, scrabbled for a metaphor. “It’s like when you bake bread. The second rise.”

Daisy’s eyes widened. Then, a brilliant, blazing smile spread across her face. It was the smile of someone who had just discovered the first rule of a fantastic new game. “No way.”

She didn’t hesitate. Her hand, still slightly damp, moved back.

Gemma whimpered. “Daisy, I just… it’s sensitive…”

“We have to verify,” Daisy said, her tone leaving no room for argument. Her thumb and finger found their place again, this time with renewed purpose. The touch was no longer just clinical. It was hungry. It was testing a hypothesis.

The sensation was immediate and intense, a bright flash of oversensitive nerve endings that made Gemma jerk. But beneath the hypersensitivity, she felt it—the same low thrum, already beginning again. The coil, not just rewinding, but starting from a new, expanded point.

Daisy leaned closer, her breath warm on Gemma’s skin. “Let’s see,” she whispered, not to Gemma, but to the thing in her hand. “Let’s just see what you can do.”

“Let’s just see what you can do.”

Gemma’s breath hitched as Daisy’s hand began to move again. This time, the touch wasn’t clinical. It was intent. A slow, firm stroke that chased the fading echoes of sensation and found them still vibrantly, embarrassingly present.

“It’s still… sensitive,” Gemma gasped, but the protest was weak, swallowed by a fresh wave of that low, magnetic pull. The oversensitivity was real, a sharp buzz just beneath the skin, but it was already being overtaken by the returning swell of pressure. It was rebuilding itself, faster this time, from a foundation that felt undeniably… more.

Daisy watched, fascinated, as it filled her hand again. “You weren’t kidding,” she murmured, her strokes becoming more confident, more rhythmic. “It’s definitely bigger. Not by a ton, but… noticeable.”

Gemma could only nod, her head pushing back into her pillow. The coil was winding again, tighter and more urgent. It wasn’t a gentle build. It was a demand. Her hips rose off the mattress of their own accord, meeting Daisy’s hand. The textbooks on her desk, the glow-in-the-dark stars on the ceiling, the whole world dissolved into the singular point of friction and building heat.

The second climax crashed over her just minutes after the first. It was less of a shock and more of a deep, rolling shudder that locked her muscles. She cried out, a short, sharp sound that was half-surprise, half-surrender. The release was more substantial, a warm pulse that left her trembling.

She collapsed, spent, staring at the water-stain Italy. “Okay,” she panted. “Okay, that’s… that’s definitely enough. We have data. Baseline established. Can we stop now?”

Daisy didn’t answer. She was staring, transfixed, at her own hand. Then she looked back at Gemma, her eyes wide with pure, unadulterated wonder. “Gem.”

“What?”

“Look.”

Gemma forced her head up. She looked down. Her stomach, now streaked, was one thing. The other thing was the thing itself. It was still hard. Fully, undeniably erect. It hadn’t softened at all after the second orgasm. It just… persisted, throbbing slightly, looking even more substantial than it had thirty seconds ago.

“No,” Gemma whispered.

“Yes,” Daisy breathed, her voice full of awe. “It… likes it.”

“It doesn’t ‘like’ anything, it’s a… a magical growth! A curse! A penis!”

“A magical penis that gets bigger and doesn’t get soft,” Daisy corrected, a slow, wild grin spreading across her face. “We have to test the limits.”

“Daisy, no, I can’t, I’m—”

Daisy’s hand moved again. This time, her touch was different. It was less about observation and more about… collaboration. Her thumb swiped over the tip, spreading the residual wetness, and the sensation was so acute, so direct, that Gemma saw stars. A third wave, which she hadn’t known was even possible, was already cresting. It was faster, harder. It tore through her with a violence that was almost frightening. She arched off the bed, a silent scream on her lips, her fingers scrabbling at the sheets.

When it passed, she was slick with sweat, every muscle liquid. She felt drained, hollowed out, completely used.

And yet.

It remained. Solid. Unyielding. A sentinel of unfamiliar pleasure.

Daisy let out a low whistle. “You’re a machine.” There was no disgust in her voice. Only admiration. She leaned forward, her curiosity overriding everything else. Her lips parted.

“Don’t you dare,” Gemma croaked, but the warning had no force.

Daisy didn’t take it into her mouth. Instead, she pressed her lips to the inside of Gemma’s thigh, a soft, unexpected kiss. Then her tongue followed, a quick, experimental taste of Gemma’s skin, salty and clean. The touch, so intimate and so tender in the midst of this clinical absurdity, was what finally broke the dam on Gemma’s fourth release.

It wasn’t an earthquake this time. It was a collapse. A full-body surrender that left her gasping, tears leaking from the corners of her eyes from sheer sensory overload. It felt less like pleasure and more like being rewritten from the inside out.

When the world swam back into focus, Daisy was staring, her lips parted in genuine shock. “Four,” she whispered.

Gemma couldn’t speak. She could only nod weakly.

And finally, blessedly, it began to soften.

Gemma blacked out, or fell asleep, or maybe her brain just short-circuited completely. The last thing she saw was Daisy’s face, lit with a kind of triumphant, exhausted joy, before the darkness swallowed her whole.

Morning light, thin and watery, filtered through the cheap blinds. It painted stripes across a landscape of discarded clothing, an empty pizza box, and two tangled bodies.

Gemma woke by degrees. First, the smell of Daisy’s vanilla perfume, gone a little stale with sleep. Then, the ache in her muscles, a deep, satisfying tiredness. Then, the warmth. A heavy, comforting weight across her stomach, a leg thrown over hers, blonde hair tickling her chin.

She blinked slowly. Daisy was sprawled half on top of her, one arm draped possessively across Gemma’s waist, their faces inches apart. In sleep, Daisy looked younger, her adventurous edge softened.

Gemma shifted, trying to extricate herself without waking her roommate. The movement pulled the threadbare blanket down her body.

And she felt it.

A different kind of weight. A foreign, familiar presence resting against her own thigh. She froze.

With a dread that was becoming routine, she looked down.

There, in the clear, unflattering light of morning, it lay. Flaccid. At rest.

And it was unmistakably, undeniably larger than it had been in its fully erect state the night before. The math was irrefutable. The “specialty model” Daisy had joked about was gone. In its place was something… else. Something that spoke of a potential that was both thrilling and terrifying.

Gemma stopped breathing. She stared at the ceiling, feeling Daisy’s warm breath on her shoulder, feeling the new, impossible reality resting against her leg. The night had been a whirlwind of shocking discovery. This was something else. This was a consequence. A new, permanent baseline.

Daisy stirred, nuzzling into Gemma’s shoulder. Her eyes fluttered open. They were sleep-soft, confused for a second. Then they focused on Gemma’s face, seeing the stunned, wide-eyed paralysis there.

A sleepy smile touched Daisy’s lips. “Morning,” she mumbled, her voice rough. Her hand, the one that had conducted the entire bizarre symphony of the night before, slid down Gemma’s side in a sleepy, casual gesture. It came to rest on Gemma’s hip, her fingers splayed. Her thumb began to stroke idle, unconscious circles on Gemma’s skin.

Then Daisy’s eyes drifted downward, following the path of her own hand.

She saw it. The change. The new, quiet fact of the morning.

Her thumb stopped moving. Her sleepiness vanished, replaced by a look of pure, stunned calculation. Her gaze snapped back to Gemma’s.

Neither of them spoke. The dorm room was silent except for the distant sound of a shower running somewhere down the hall. The ordinary world was waking up outside.

But in here, everything had changed again. The rules were still being written, and with every passing second, Gemma could feel the narrative of her own life twisting further away from anything she had ever known. Daisy’s fingers tightened slightly on her hip, not in passion, but in a fierce, possessive grip of shared, terrifying knowledge.

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