Cover of The Experimental Endeavor (F)

The Experimental Endeavor (F)

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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 11: The Needle's Second Promise

The lab smelled like a storm had just passed through—ozone, cold metal, and something subtly organic, like wet earth under a microscope. Evie sat on the edge of a steel examination table, a thin paper gown crinkling under her thighs. She felt absurd. Exposed. The pink tips of her hair were a splash of defiant color against the sterile white and gunmetal grey of Dr. Anya Sharma’s domain.

Clare stood by the door, arms crossed over her chest, still in her work blazer. She’d taken a long lunch for this. Her eyes were fixed on Evie’s lap where the gown tented obscenely. Evie was already semi-hard, a Pavlovian response to the anticipation humming in the room. Or maybe it was the fear.

Dr. Sharma finished typing on her computer, the light from the screen painting her severe face in otherworldly shadows. She turned, her movements efficient, insectile. Her gloved hands held a digital caliper and a slender, pre-filled syringe. The liquid inside wasn’t clear like the last one. It swirled, oily and opalescent, catching the light in sickly rainbows.

“We’ll establish a new baseline,” Sharma said, her voice devoid of bedside manner. It was a statement of fact. She didn’t wait for consent. She flipped the paper gown up over Evie’s stomach.

Evie flinched. The air was cool on her bare skin. Her cock, heavy in its flaccid state, lay against her thigh. Sharma’s touch was neither rough nor gentle. It was precise. The cold metal of the caliper closed around the mid-shaft. A digital readout beeped softly on a nearby monitor, displaying numbers that meant nothing to Evie but made Clare take a sharp, interested step forward.

She measured the length, the circumference of the head, the girth at the base. Each touch was a clinical violation. Evie stared at a crack in the ceiling tile, trying to divorce her mind from what was happening below her waist. Clare’s hungry gaze felt heavier than the caliper.

“Can you induce full erection for a volumetric assessment?” Sharma asked, looking up. Her green eyes were like lenses, focusing, calculating.

Evie’s face burned. “I can’t just… on command.”

“Clare?” Sharma said, the invitation clear, detached.

Clare didn’t hesitate. She crossed the room, her heels clicking on the tile. She knelt in front of Evie, her professional demeanor melting away into something primal. She didn’t kiss or tease. She took Evie into her mouth with a direct, purposeful suction.

Shame and arousal collided in Evie’s gut. Being made to perform like this, under the doctor’s observing eye, was degrading. Yet her body responded, betraying her. She grew rapidly in Clare’s mouth, hardening to a full, throbbing erection. Clare pulled off with a wet sound, a string of saliva bridging her lips to the glistening tip. She looked up at Sharma, her lips swollen, her eyes triumphant.

“Adequate,” Sharma said, moving in again with the calipers. The numbers on the screen climbed. Clare stayed on her knees, her hand gently stroking Evie’s inner thigh, a possessive gesture.

“The serum can be adjusted,” Sharma said, placing the calipers aside and picking up the syringe. She tapped the plunger, expelling a tiny air bubble. The opalescent fluid seemed to writhe in the chamber. “The peptide sequences in this compound, Beta-Variant Seven, target the corpora cavernosa fibroblasts with… aggressive specificity. Growth will be more exponential, not linear.”

“How much bigger?” Clare’s voice was breathless.

“Theoretically, limits are defined only by tissue integrity and vascular support.” Sharma’s eyes flicked to Evie’s face. “You will likely need to endure some... extreme pain, significant edema, possible epidermal fissuring. The process is visceral.”

Evie’s heart hammered against her ribs. “Fissuring?”

“The skin must stretch to accommodate the new mass. It will be… traumatic.” Sharma said it like she was describing a predicted weather pattern. “You will require manual stimulation throughout the primary growth phase to maintain perfusion. Stasis is a risk.”

Clare’s fingers tightened on Evie’s thigh. “I’ll handle that.”

“Administering now.” Sharma didn’t ask. She swabbed the base of Evie’s cock with a cold antiseptic pad, then positioned the needle against the skin, just where the shaft met her pelvis. The pinch was sharp, immediate. Then a burning flood as the plunger descended.

Evie cried out. It wasn’t the pain of the needle, but the fire igniting in her core. It felt like molten lead was being pumped directly into the root of her. She gasped, her back arching, her hands scrabbling at the cold steel table.

Sharma observed, stepping back to monitor a suite of vital signs blinking on a screen. “Vasodilation commencing.”

It started as a deep, internal throb. A pulse that was wrong, too big, too fast. Evie looked down. Her cock, already erect from Clare’s mouth, began to darken, flushing a deep, angry purple. The veins along its length swelled, rising into thick, ropy cords beneath the skin. It twitched violently, a jumping fish on a line.

“Oh, fuck,” Clare whispered, her hand reaching out but stopping short, afraid to touch.

The thickening was visible. A gradual, relentless inflation. The shaft expanded, the skin growing taut, shiny. The head, already broad, began to swell like a mushroom cap, the urethral slit pulling slightly open. Evie panted, a low groan torn from her throat. It was a feeling of being stuffed, overfilled, from the inside out. A pressure building with no release valve.

“Engorgement is rapid,” Sharma noted, her fingers flying over a tablet. “Clare, manual intervention now, please. Prevent ischemic compromise.”

Clare’s lawyerly composure shattered into pure lust. She wrapped both hands around the growing girth. Her fingers could no longer meet. She began to pump, a firm, steady rhythm. The feel of it was obscene. The skin was hot, almost feverish, and so tight it felt like polished stone. Under her hands, it continued to grow, pushing against her constricting grip.

“It’s… it’s still getting bigger,” Clare moaned, staring at the monstrous thing in her hands. Her cunt was dripping, a dark stain spreading on the expensive wool of her skirt where she knelt. The clinical horror of the situation was being swallowed whole by her raw, devouring fascination.

Evie was losing herself in the sensation. The pain was there, a sharp, stretching ache deep in her groin, a feeling of tendons being stressed to snapping. But it was woven through with bolts of electric pleasure, nerve-endings firing in chaotic overload. Every stroke of Clare’s hands sent jolts through her. She was a vessel for this transformation, a passive spectator in her own body.

“There,” Sharma said, pointing to the underside of the shaft. “The integument is stressing.”

A fine, red line appeared in the stretched skin, like a hair-thin crack in over-fired ceramic. It wasn’t bleeding, but it shone with a dangerous rawness.

“Should we stop?” Evie gasped, her voice tight.

“It’s only the superficial dermis. The underlying structure is reinforced. Continue stimulation.” Sharma’s voice held a note of feverish interest now. This was the data point she wanted.

Clare increased her pace, her own breathing ragged. She leaned in and licked a broad stripe up the throbbing vein on the underside, her tongue tracing the hot, tight skin. “You feel that, Evie? You feel how fucking huge you are?” She took the swollen head into her mouth, her tongue probing the slit.

A new, more intense wave of expansion hit. Evie screamed. It was a deep, tearing feeling, followed by an overwhelming rush of fullness. Clare fell back with a wet gasp, watching in awe.

The growth wasn’t just in girth now. It was lengthening, a heavy, incremental slide outward from Evie’s body, an emergence. It reached a point that seemed impossible, hovering thick and monstrous over Evie’s stomach, a veined pillar of alien flesh. The head was a bulbous, purple crown. The single red fissure had been joined by a network of fine stretch marks, a roadmap of forced transformation.

The pain crested, and for a terrifying second, Evie thought she would black out. Then, a different signal overwhelmed her nervous system. Orgasm. But not a release. A seismic, continuous shockwave. Her body convulsed. No ejaculate shot out—the internal ducts were likely clamped shut by the pressure—but the rhythmic, grinding contractions of a dry climax seized her, milking the impossible new flesh from the inside. It was the most intense, most horrifying pleasure she had ever experienced.

It seemed to go on for minutes. When it finally ebbed, she was drenched in sweat, trembling. The thing between her legs was now a permanent, horrifying fact. It hadn’t softened. It lay there, a weight of alien meat, pulsing with a low, hot throb.

Sharma was silently recording data, a faint, satisfied smile touching her lips.

Clare stood up on shaky legs. Her face was flushed, her eyes wide with a kind of possessed wonder. She wiped her mouth with the back of her hand, never looking away from Evie’s new cock. Her skirt was soaked through.

“Jesus Christ,” she breathed, the words reverent and filthy all at once.

Evie could only stare at the ceiling, tears leaking from the corners of her eyes. She was full of nothing but the terrifying understanding of what she had agreed to become. The momentum of the change still hummed in her bones, a ghost in the machine, waiting for the next command.

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