Cover of The Experimental Endeavor (F)

The Experimental Endeavor (F)

Read the story

53 chapters · 103088 words · Read 1 times

A woman and her girlfriend have a stale sex life and the girlfriend clearly isn't satisfied with toys for penetration; the woman decides to get a new experimental injection to grow a penis. Not only does it work, it also has other unintended side effects like breast growth. The girlfriend loves it, but wants even more.

Chapter 4: First Taste

Clare’s touch was a grounding wire in the static storm of Evie’s nervous system. She guided her past the living room, the abandoned dinner still simmering on the stove, and into the softer shadows of the bedroom. The familiar chaos—Clare’s silk robe draped over the chair, Evie’s sketchbook open on the nightstand—looked like a museum exhibit of a past life.

“Here,” Clare said, her voice soft with an unfamiliar caution. She led Evie to the edge of their rumpled bed. “Sit. Let me look without you… teetering.”

Evie obeyed, the mattress dipping under her. The cool air of the room on her bare thighs, on the exposed, aching flesh between them, was a brutal contrast to the heat radiating from within. She kept her eyes fixed on the floorboards, on a stray thread from Clare’s sock. Anything but the mirror, where a fractured version of this nightmare waited.

Clare knelt again, her movements deliberate. She was back in her analytical mode, but a new energy thrummed beneath the surface, a current of raw, fascinated hunger that Evie could feel like a change in the room’s pressure.

“The pain is from the engorgement,” Clare stated, her fingers returning, lighter this time, tracing the taut, veined skin. “Blood is trapped. The tissues are new. They don’t know how to relax yet.” Her thumb swiped over the slick bead of moisture that had gathered at the tip. Evie flinched. Clare brought her thumb to her lips, tasting it. Her eyes, watching Evie’s face, darkened. “Salty. Metallic. Tastes like fear and need.”

The words, so blunt, so filthy, sent a shock through Evie that had nothing to do with pain. It was a spark in dry tinder. A low, desperate sound escaped her.

“We need to relieve the pressure,” Clare murmured, more to herself than to Evie. “Manually. It’s a physiological necessity.” The clinical language was a thin veneer. Her breath was coming faster now, ghosting over Evie’s wet skin, making her twitch violently.

Then Clare leaned in. Not with a kiss, but with an open-mouthed press of her lips to the throbbing head.

Evie’s vision whited out. The sensation was too complex, too vast to process. It was warmth and wetness and a suction that spoke directly to a primal, wiring-deep need she’d never known she possessed. The sharp, consuming pain mutated, transforming under the insistent pressure of Clare’s mouth into a burning, urgent ache of a different kind.

Clare pulled back, her lips shiny. “Jesus, Evie,” she breathed, her composure cracking. “It’s so… responsive.”

Evie couldn’t speak. Her hands, tangled in the bedsheet, were fists.

“Let me,” Clare said, and this time it was a plea. “Let me try.”

Before Evie could form a thought, Clare’s mouth was on her again. This time she took more, her lips stretching to accommodate the girth. It wasn’t effortless; Evie could see the strain at the corners of Clare’s mouth, could feel the tight, hot ring of her lips as they slid down the shaft. Clare’s tongue flattened against the underside, probing, learning the new terrain.

A guttural groan tore from Evie’s throat, a sound from a cave-deep place. Her hips jerked forward of their own volition, a clumsy, instinctive thrust. Clare’s hands flew to her hips, fingers digging in, not to stop her, but to guide her, to set a rhythm.

“Yeah,” Clare mumbled around her, the vibration travelling straight up Evie’s spine. “Like that. Fuck my mouth, baby. It’s what it needs.”

The obscenity, the sheer, graphic instruction, detonated in Evie’s brain. This was Clare. Her Clare, who argued tax law over breakfast, who folded her socks into perfect little squares. And she was on her knees, telling Evie to fuck her mouth.

Evie’s hips began to move in shallow, desperate thrusts. The feel of it—the tight, wet heat enveloping her, the way Clare’s throat relaxed to take her deeper on each push—was an all-consuming reality. The last remnants of the cramping, frantic pain were being swallowed, literally, by this new, overwhelming sensation. It wasn’t gone; it was being forged into something else: a driving, pounding need for release.

Clare hummed, the sound a deep vibration that made Evie cry out. Her fingers tightened on Evie’s thighs, nails biting into soft skin. She picked up the pace, her head bobbing with a hungry expertise that erased every doubt, every insecurity Evie had ever carried about their sex life. Clare wasn’t enduring this. She was feasting on it.

Evie’s hands found Clare’s head, fingers tangling in the blonde hair, dislodging the bun. She wasn’t guiding; she was holding on for her life as the pressure inside her coiled, tightened, a spring wound to its absolute limit. The world narrowed to the slick sounds, Clare’s ragged breathing through her nose, the obscene, beautiful sight of her own flesh disappearing between Clare’s perfect, willing lips.

“Clare, I— I can’t—” Evie gasped, a warning and a prayer.

Clare just looked up, her blue eyes meeting Evie’s, glazed with an intense, pleasurable focus. She took Evie deeper, until her nose pressed into the wiry hair at the base. She held her there, her throat working, and then pulled back slowly, dragging her tongue along every straining inch.

It was too much. The coil snapped.

Evie’s back arched off the bed as a orgasm unlike anything she had ever experienced erupted from her. It wasn’t a spreading warmth; it was a violent, pulsing expulsion, a series of deep, internal convulsions that seemed to originate from the very core of this new appendage and radiate out, shaking her entire frame. A choked, ragged cry was ripped from her lungs.

Clare’s eyes flew wide for a second, surprised by the force. Then they fluttered shut. She stayed there, taking it, swallowing convulsively as Evie pulsed into her mouth. Her hands rubbed soothing circles on Evie’s trembling thighs.

When it was over, Evie collapsed back onto the bed, spent, hollowed out. The frantic, painful pressure was gone. In its place was a deep, throbbing sensitivity and a ringing, deafening silence in her head.

Clare pulled off slowly, a soft pop breaking the quiet. She sat back on her heels, wiping her mouth with the back of her hand. She was breathing hard, her cheeks flushed, her lips swollen and wet. She looked dazed, triumphant, utterly satiated.

Evie, trembling, looked down. Between her legs, her cock—still erect, but softened slightly—glistened with spit and her own release. And it was… different. The angry red flush had faded to a rosy pink. It looked… settled. More integrated. And, undeniably, it looked thicker.Longer. The veins stood in more pronounced relief against skin that now seemed to belong.

“Holy shit,” Clare whispered, her gaze fixed on the same transformation. She reached out, her touch now exploratory rather than desperate. Her fingers couldn’t close as easily around it. “Evie… it grew.”

The words landed, heavy and strange. Evie could only stare, the aftermath of the orgasm leaving her mind sluggish. She had done this. The injection, the panic, Clare’s mouth… it had all culminated in this irreversible change, now literally stamped upon her body, made larger by her own orgasm.

Clare’s stunned expression melted into something slow, possessive, and deeply hungry. A smile touched her ruined lips. She climbed onto the bed, straddling Evie’s hips, her weight a comfortable, familiar anchor. She looked down at Evie’s face, then at the proof of the change between them.

“It’s not over,” Clare said, her voice husky. Her hands went to the hem of her tank top, pulling it over her head in one smooth motion. Her breasts, freed, were pale and full in the lamplight. “Now we find out what it can really do.” She leaned down, her breath warm against Evie’s ear. “My turn.”

Read on DreamPress

Write your own erotic story with AI