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 18: Playful Posession

The door to the apartment shut with a soft, definitive click. The sound was a punctuation mark, separating the chaotic neon of the roof from the cluttered silence of their home. The lighting was too bright, too harsh, revealing the mess with cruel clarity. Evie hugged her oversized shirt tighter around her, the linen sticking to the drying mess on her stomach.

Clare didn’t move from the door, her back to Evie. Her shoulders were rigid under the damp one-piece. The silence stretched, taut enough to snap.

“Those kids…” Evie started, a weak attempt to bridge the chasm.

“Shut up.” Clare’s voice was low, wire-tight. She turned. Her face was pale, her eyes dark pools. “You came in her.” It wasn’t a question. It was an indictment.

Evie flinched. The seed had taken root, tiny and terrified, the moment she saw that glistening trail on Sophie’s thigh. “I… it just happened. I couldn’t…”

“You couldn’t control it?” Clare laughed, a short, hollow sound. “Bullshit. You didn’t want to.”

“That’s not true,” Evie whispered, feeling small, defensive. Her body felt alien again, a foreign ship she was piloting into a jagged coastline.

“Isn’t it?” Clare finally pushed off the door, advancing. The elegant predator from the rooftop was gone, replaced by a caged, furious thing. “You saw her take it all. You felt her little pussy squeezing you. You fucking loved it. It made you lose your mind.”

“You were there!” Evie’s voice cracked. “You held her hair, you told her to take it, you fucking made her come! You—you liked watching!” The memory flashed, vivid and sickeningly hot. “You told me to fuck her, Clare. You wanted this.”

Clare stopped inches away. The scent of chlorinated water, sweat, and sex on her skin was overpowering. Her nostrils flared. For a long moment, she just stared, her gaze boring into Evie’s, looking for a lie, a flaw. Then, the rigidity in her shoulders softened, just a fraction. The anger bled out, leaving something rawer, more chaotic behind.

“I did,” she breathed, the admission escaping like steam. “Jesus fucking Christ, I did.” Her eyes were wide, almost shocked at herself. “I wanted to see her break on you. I wanted to use her to see what you could do. And when she…” Clare’s hand came up, fingers splaying over her own stomach as if feeling a phantom impact. “When she came on your cock, and you… I could see it. I could see you pumping into her. I felt it in my own cunt.” Her voice dropped to a ragged whisper. “It was the hottest, most fucked-up thing I’ve ever seen.”

Evie’s breath hitched. This was a different kind of nakedness. The confession hovered between them, toxic and seductive. Clare’s blue eyes weren’t cold anymore; they were molten with a confused, shameful hunger.

“And then,” Clare continued, her voice hardening again, “I saw my girlfriend’s cum dripping down her leg. And you…” Her eyes swept over Evie’s damp shirt, her bare legs. “You just sat there, spent. You looked… satisfied.”

She reached out, her fingers not gentle as they traced the line of Evie’s jaw, then down her throat. “You have no idea what you are now. What you can do.” Her hand dropped to the top button of Evie’s shirt. With a sharp tug, she popped it open. Then another. She didn’t undress Evie; she uncovered her, like stripping a veiled statue.

The cool air of the apartment hit Evie’s damp skin, raising goosebumps. Clare’s gaze raked over her, from the swell of her moderate breasts, down to the dark, tangled thatch of hair below her navel, and lower, to where her cock, spent and heavy, lay against her thigh. Clare’s expression was one of pure, frustrated avarice. It was the look she gave a formidable legal opponent, a complex contract, a problem she had to conquer.

“Sophie can take it,” Clare said, more to herself than to Evie. Her hand drifted to Evie’s chest, her thumb rubbing over a nipple. It tightened immediately, a bolt of sensation shooting straight down to Evie’s groin. A low, reluctant twitch answered below. “Her little slut-body just… opened up for you. Like it was made for it.” The words were bitter, jealous. Her other hand slid down, fingers closing around Evie’s softness. She squeezed, not pleasurably, but possessively. “This is mine. This fucking monster is mine. I made it happen.”

She leaned in, her lips brushing Evie’s ear. Her breath was hot. “And I’m going to take it back.”

Clare stepped away, her movements decisive. She peeled her one-piece down her body in one fluid, aggressive motion, letting it fall to the floor. She was naked, sleek and powerful in the stark light. Without another word, she walked to their bed and climbed onto it, positioning herself on her knees at the center. She looked over her shoulder, her blonde hair a cascade down her back. Her expression was pure challenge. “Come here.”

Evie’s legs felt like water, but she obeyed. She stood by the edge of the bed. Clare’s eyes were on her cock, which, under that intense stare, was thickening, lifting from her thigh, filling with a heavy, relentless blood.

Clare reached back, her fingers sliding between her own legs. She wasn’t gentle. She spread herself open, her slickness already glistening. “Look,” she commanded. “Look how wet I am.For you. Because of you. After watching you wreck that little redheaded cunt.” She circled her clit roughly, her hips rocking back against her own hand. A low moan escaped her. “Now give it to me. I don’t want half. I don’t want you to be careful. I want all of it.”

The raw need in her voice, stripped of all pretense, was the most potent aphrodisiac Evie had ever known. Her cock swelled to its full, daunting size, jutting out heavy and veined. Evie climbed onto the bed behind Clare. The sight of her girlfriend, presented, open, and demanding, sent a primal surge through her.

She guided the broad, purplish head to Clare’s entrance. It was already slick and hot. Clare pushed back immediately, taking the first thick inch with a sharp gasp. She was tight. Tighter than Sophie.

“Fuck,” Clare hissed, her knuckles white where she gripped the rumpled comforter. Her head bowed. “More.”

Evie pushed forward, her own nerves screaming. This was the same boundary, the same impossible stretch. Clare’s body resisted, a fierce, clenching ring of muscle fighting the invasion. Sweat beaded on Clare’s shoulder blades. A tremor ran through her thighs.

“Clare…”

“I said more.” The words were ground out between clenched teeth.

Evie thrust, a slow, relentless pressure. Another inch sank in, then another. Clare cried out—a sharp, pained sound that morphed into a guttural groan of triumph. She was impossibly full, stretched to a searing brink. She’d only managed to take about half of Evie’s length. Her body quaked with the effort, her cunt a burning, vise-like sheath.

“See?” she panted, her voice shaky but laced with a desperate pride. “See? I can take it.” She tried to rock back, to take more, but her muscles locked, trembling. A sob escaped her. “Fuck. It’s too much. It feels like I’m splitting.”

Tears of strain welled in Clare’s eyes. Evie was frozen, halfway inside a paradise of crushing heat, terrified of causing real pain.

Then Clare laughed, a wild, broken sound. She looked back, her face flushed, tears cutting tracks through her makeup. “But don’t you dare stop. Don’t you fucking dare.” She forced her hips to move, a tiny, torturous grind. “Fuck me, Evie. Fuck me like you fucked her. Make me feel it for days.”

The permission, the raw plea, broke Evie’s hesitation. She gripped Clare’s hips, her fingers digging into the firm flesh. She pulled back slightly, then pushed forward again, not harder, but deeper into the fraction she could reach. The wet, resisting drag was exquisite. Clare’s juices smeared down the shaft, soaking Evie’s lower stomach and the sheets beneath them.

“Yes,” Clare keened. “Oh god, yes.Just like that. It’s so deep. So fucking big.” Her words dissolved into incoherent babble as Evie set a rhythm, short, deep thrusts that made Clare’s whole body jerk. The bedframe began a soft, steady creak.

Evie leaned over Clare’s back, her chest pressed against slick skin. She could feel the frantic hammer of Clare’s heart. She reached around, her hand finding Clare’s swollen breast, squeezing, pinching the nipple. Clare arched against her with a sharp cry, her inner muscles clamping down in a violent, rhythmic spasm. She was coming, a hard, sudden climax that shook her frame, her cunt milking the embedded length of Evie’s cock in frantic pulses.

It pushed Evie over the edge. The orgasm ripped through her with no warning, a seismic release. It felt different from Sophie—deeper, more agonizingly intimate. A hot jet pumped into Clare’s clenching depths, followed by another, and another. It was a claiming. A violent, biological answer to Clare’ desperate ownership.

For a long minute, there was only the sound of their ragged breathing. Clare had collapsed forward, her face buried in the sheets, her body still shuddering with aftershocks. Evie stayed buried inside her, softening slowly in that incredible heat.

Finally, Clare shifted, wincing. Evie slid out with a wet, thick sound. They both looked down at the mess. The sheets were soaked. Between Clare’s thighs, a trickle of white mixed with her own slickness escaped, pooling beneath her.

Clare rolled onto her back, wincing again at the tenderness. She looked up at the ceiling, her chest rising and falling. She didn’t speak.

Evie lay down beside her, hollowed out, adrift. She stared at the cracked plaster of the ceiling, a mirror to the fractures inside her. She had given Clare what she’d asked for. She had taken back what was hers.

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