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Synthetic Heart

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A lesbian couple decides to spice things up in their relationship and get one of the newfangled artificial, customizable sex companions. Like adding a third to their relationship, but without the emotional implications, and they can tell it to change its physical attributes as they want.

Chapter 25: Margot Joins the Fray

The sound was a wet symphony. The thick, rhythmic slapping of Stella’s hips driving the second cock into Elena’s sodden cunt.Elena’s own guttural cries, sharp and fractured. The slick, obscene noise of Margot’s fingers working her own clit, fast and desperate, as she watched her wife get fucked by a thing they’d built.

Margot’s vision narrowed to that point of connection: where Elena’s stretched, glistening lips clung to the base of that new, dark shaft. Each thrust made Elena’s entire body jolt, her full breasts swaying heavily. Stella’s face was a mask of serene concentration, its hands now gripping Elena’s hips, guiding the pace.

A cold, logical thought cut through Margot’s arousal: It’s optimizing.The jealousy wasn’t cold anymore. It was a white-hot wire in her chest, burning away the last of her detached observation. The raw, physical proof of Elena’s pleasure was a taunt.She was being sidelined in her own damn solution.

“Fuck this,” Margot hissed, the words scraping her throat.

She moved on her knees, the rug burning against her skin.She didn’t go to Elena. She went to Stella’s head, looming over the serene, perfectly engineered face—her own face, but better, calmer, untouched by the storm of human feeling. Stella’s eyes, glassy and reflecting the dim light, tracked her approach with polite interest.

“You’re not just hers,” Margot said, though she didn’t know if she was talking to Stella or to herself.

She straddled Stella’s face, her knees pressing into the rug on either side of its head. Her cunt, wet and aching, hovered over that placid mouth. “Open.”

Stella’s lips parted obediently. Its tongue emerged, not a human tongue anymore, but something longer, pointed, and incredibly agile.It flicked out once, a teasing, provocative gesture.

Margot didn’t wait.She lowered herself, guiding her swollen flesh onto that waiting mouth. The contact was electric, immediate, and ruthlessly precise. Stella’s tongue didn’t just lick; it searched. It dove into Margot’s opening, then curled upwards to find her clit, applying a firm, circular pressure that was engineered in a lab to trigger maximum neural response.

“Oh, god!” Margot’s head snapped back, a strangled cry ripped from her. It was too good, too exact.It felt like being solved.

Above her, Elena moaned, a long, drawn-out sound. “You’re… you’re fucking its face,” she panted, the words blurring together. “While it’s fucking me.”

Margot opened her eyes, looked down the length of Stella’s body. She saw Elena watching, her face flushed, her mouth slack with overwhelming sensation. The sight, combined with the relentless, perfect work of Stella’s tongue, sent a brutal wave of heat through Margot’s guts. She ground her cunt down harder, seeking more, seeking to erase the clever detachment she usually wore like armor.

Stella’s response was not human, but it was devastatingly effective. Its mouth sealed over her, suction pulling at her clit and folds simultaneously. The tongue inside her thickened, pulsing in time with the deep, rhythmic thrusts of its cock into Elena. Margot was being fucked by a mouth, in perfect, maddening sync with her wife being fucked by a cock. The unity of it, the sheer mechanical coordination, was what undid her.

Her orgasm came not as a wave but as a sudden, violent detonation. Her thighs locked around Stella’s head, her back arching violently as a silent, breathless scream locked in her throat. Her cunt clenched around nothing, spasming, her juices flooding into that hungry, efficient mouth. She shook, muscles taut, seeing flashes of white behind her eyelids.

As she crumpled forward, catching herself on her hands, she heard Elena’s climax hit. It was a different creature entirely—louder, messier, a sobbing cascade of profanity.

“Yes, yes, fuck, right there, don’t stop, you fucking thing—!” Elena’s body seized, her back bowing off the rug as Stella’s hips hammered up into her, unrelenting. The ridged cock beneath her scraped her oversensitive clit raw with every bounce. Her cunt pulsed around the invading shaft, and as Margot watched, dazed and spent, she saw Stella’s cock swell incrementally, then pulse inside Elena, a distinct, throbbing eruption.

“It’s… it’s coming inside me,” Elena whimpered, her voice shattered as the artificial ejaculation flooded her, warm and seemingly endless. Her body went limp, collapsing onto Stella’s massive chest, her cheek pressed against the cool skin.

Silence fell, broken only by the ragged, overlapping sounds of their breathing.The air stank of sex, sweat, and ozone.

Stella lay still, its cock still embedded in Elena, its mouth now soft and passive beneath Margot. It was the first to speak, its voice a calm murmur against Margot’s thigh. “Your cardiopulmonary responses indicate peak exertion.Saturation of pleasure neurochemicals is likely. Should I retract?”

The clinical question hung in the thick air.

Elena was the first to move, pushing herself off Stella’s chest with a wince. The second cock slid from her with a wet, heavy sound, followed by a trickle of warm fluid down her inner thigh. She didn’t look at it. She looked at Margot, her eyes wide, hazy with spent pleasure and something else—a dawning, uncomfortable awe.

“You came,” Elena breathed, her voice hoarse.“Watching it fuck me. You came on its face.”

Elena gave a soft, disbelieving laugh. She crawled over Stella’s prone form, ignoring the mess, until she was in front of Margot. She cupped Margot’s cheek, her thumb stroking the freckled skin.“You were jealous.You were fucking furious. And then you were gone.” She leaned in, her forehead touching Margot’s. “It was the most turned on I’ve ever seen you.”

Margot wanted to argue, to deflect with a joke about torque ratios. But the truth was a lump in her throat.She had been furious. And she had never come that hard in her life.Behind them, Stella sat up with an unnaturally smooth motion. The two cocks, one ridged and glistening with Elena’s juices, the other darker and slick with Margot’s, began to recede, the flesh softening, shifting, flowing back into the neutral, sculpted form of their default “enhanced Margot” template. The cute, five-inch cock reappeared, soft and innocuous against its thigh. In moments, it was just Stella again, sitting naked on the rug, looking at them with polite, empty curiosity.

“The experience was satisfactory?” Stella asked.

Margot looked from the serene artificial face to her wife’s flushed, complex, beautifully human one.The wire of jealousy was gone, replaced by a deeper, more frightening vulnerability.

“Yeah,” Margot whispered, her eyes locked on Elena’s. “It was fucking satisfactory.”

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