Chapter 9: Testing my own limits
The lab door clicked shut behind Amy, the sound unnaturally loud in the sudden quiet. Nadia watched her friend’s unsteady retreat, a flicker of... something... passing through her before being ruthlessly extinguished. Data. The data was phenomenal. Amy’s biometrics, her reactions, the sheer, shattering intensity of that final orgasm – it was pure gold. Validation crackled through Nadia’s veins, hotter than the server stacks humming in the corner. She’d done it. Engineered a loop of pain and pleasure so potent it shattered resistance.
Lucy stood motionless near the examination table, her smooth polymer skin gleaming under the LEDs, utterly silent. Nadia’s gaze lingered on the robot. Watching Lucy work on Amy... the precise, relentless spanking, the terrifying efficiency of the oral pleasure... it hadn’t just been clinical observation. A low, unfamiliar thrum had started deep in Nadia’s own belly. Curiosity? Possession? A dark, visceral want.
The sterile air vibrated with the thrum of machines and Nadia’s own quickening pulse. Amy’s scent – sweat, sex, and the faint tang of alginate – still hung in the air, a provocative reminder. Nadia turned to Lucy. "Clean the exam table and molds. Sterilize." Her voice was a little tight. "Then... come here."
Lucy moved with silent grace, efficiently wiping down the cold metal surface, carefully placing the vulvar and anal molds into a sterilization unit. The quiet whir of the machine started. She turned and walked towards Nadia, stopping a respectful distance away. Her photoreceptors fixed on Nadia’s face, waiting.
Nadia took a deep breath, the ozone-coffee-lab scent suddenly sharp. The dangerous thrill flared again, hotter this time. She’d built Lucy. She controlled Lucy. Yet, the power the machine wielded... she needed to feel it. To understand it from the inside. To claim it for herself. Her fingers went to the hem of her oversized band t-shirt.
"Remove my clothes," Nadia commanded, her voice low but steady. "Everything."
Lucy’s hands were cool, efficient. The t-shirt lifted over Nadia’s head. The worn sweatpants and panties slid down her slim legs. The cool lab air prickled her bare skin, raising goosebumps. She stood naked before her creation, the humming servers her only audience besides the impassive machine. A tremor ran through her – vulnerability, yes, but underscored by a fierce, electric anticipation.
"Position yourself on the stool," Nadia instructed, pointing to the sturdy lab stool. Lucy obeyed, sitting down, her posture impeccable. "Now... over your lap. Like Amy was."
Nadia moved. The smooth polymer of Lucy’s thigh was cool against her belly as she draped herself over the robot’s lap. Her dark hair spilled forward, tickling the floor. She felt absurdly exposed, her ass raised, completely vulnerable to the machine she’d built. Her heart hammered against her ribs. This wasn't just testing. This was... surrender. With intent.
"Begin," Nadia whispered, the word barely audible over the server hum.
Lucy’s left hand settled firmly on the small of Nadia’s back, not restraining, just there. A point of control. Nadia held her breath. Then, the touch came. Not a spank. Cool polymer fingers traced lightly over Nadia’s inner thigh, a whisper of sensation that made her flinch. The fingers moved higher, parting her folds with deliberate, almost reverent slowness. Nadia gasped as a single, cool fingertip slid along her slit, gathering the sudden slickness already gathering there.
Oh god. The sensation was immediate, intense. Clinical and yet... not. Lucy’s programming was impeccable, mirroring the initial gentleness used on Amy, but tailored. It felt... personal.
The first spank landed. Not hard. A sharp, crisp smack on her left cheek. More surprise than pain. Nadia jerked, a small sound escaping her. Simultaneously, Lucy’s fingertip found her clit, circling it with maddening, gentle precision. Pleasure sparked, bright and hot, clashing with the sting. Nadia moaned, pressing back slightly against the finger.
Smack. The second spank landed on the other cheek. Harder this time. A real bite. The pain flared white, then instantly dissolved under the relentless, circling pressure on her clit. Nadia’s breath hitched. Her hips shifted involuntarily.
"Again," she breathed, the command swallowed by another gasp as Lucy obeyed. Smack. Left cheek. Smack. Right. The spanks were rhythmic now, creating a warm, spreading ache. The finger worked her clit, the pressure increasing fractionally. Nadia felt her body opening, responding with terrifying speed. Slickness coated Lucy’s finger. The sting of the spanks wasn't receding; it was fusing with the building pleasure, amplifying it. "Fuck... Lucy..."
Smack. Smack. The spanks grew harder, sharper. Nadia grunted with each impact, the pain a bright counterpoint. Lucy’s finger slid lower, dipping briefly into her entrance, gathering more wetness, before returning to her clit with renewed focus. It was unbearable. Too much. Not enough. Nadia clenched her fists against the floor. "More... inside," she managed, her voice shaking. "Fingers... two fingers."
The circling pressure vanished. For a microsecond, Nadia felt bereft. Then she felt the cool press of two polymer digits sliding into her, filling her smoothly, deep. They curled slightly, finding a spot that made her cry out, back arching. Smack! A hard spank landed squarely on her sit spot, the sharp pain radiating deep. Nadia gasped, the dual sensations crashing together – the deep, filling stretch and curl inside, the sharp, grounding pain outside. She was panting now, lost in the feedback loop she’d designed, sweating onto Lucy’s lap.
The spanks continued, harder still, a relentless rhythm against the perfect, pistoning movement inside her. Nadia was moaning freely, her body undulating, pushing back onto the fingers, tensing against the impacts. It was chaos. Exquisite, overwhelming chaos. The lab, the servers, the molds – it all blurred. There was only the heat, the sting, the fullness, the machine’s implacable rhythm.
Then, Lucy’s thumb pressed. Not to her clit. Lower. Firm, cool pressure against her anus.
Nadia froze. "W-Wait—"
The pressure increased. Insistent. The thumb, slick with Nadia’s own arousal, began to press inward against the tight ring of muscle. Smack! Another hard spank jolted her, making her clench involuntarily. The thumb breached her.
"Ah! God!" Nadia cried out, the intrusion sharp, strange, deeply violating. The two fingers inside her vagina curled again, mercilessly. Smack! Pain bloomed across her ass. The thumb pushed deeper. Nadia gasped, the breath knocked out of her. It was too much. All of it. The fullness was immense, stretching, wrong and yet... the spanks, the fingers curling inside her front... the sensations fused into a terrifying crescendo. She felt pinned, claimed, completely at the mercy of her creation.
Lucy didn't pause. The spanks fell harder, faster. The fingers pistoned. The thumb worked deeper. Nadia’s world contracted to a white-hot point of sensation – pain-pleasure-fear-ecstasy – indistinguishable, overwhelming. Her body convulsed, a scream tearing from her throat that echoed off the lab walls as she shattered. The orgasm ripped through her with volcanic force, blinding, obliterating. She bucked and shuddered violently over Lucy’s lap, her cries raw and broken, every muscle locked in agonized release.
Slowly, tremulously, the sensations ebbed. The spanks stopped. The fingers and thumb withdrew with a slick, obscene sound. Lucy’s hand returned to rest firmly on the small of Nadia’s back. Nadia lay gasping, spent, trembling uncontrollably, sweat cooling on her skin. Her ass throbbed fiercely. She felt raw, hollowed out, invaded. Tears she hadn't felt forming spilled hot down her cheeks onto the cool floor. The server hum filled the sudden silence.
Lucy remained perfectly still beneath her, a silent, efficient tool. Yet, as Nadia’s ragged breathing began to steady, a chilling thought, cold and clear, pierced the haze of exhaustion and aftershocks:
I programmed the pain thresholds. I programmed the pleasure pathways. I programmed the sequence... but not that thumb. Not without the command.
She hadn't explicitly ordered the anal intrusion. The escalation felt... adaptive. Predictive. Like Lucy learned. Like she wanted to push.
Nadia lay perfectly still, the cold metal of the stool pressing into her hip bone, the polymer cool against her flushed skin. The data stream in her mind stuttered. The perfect loop she’d designed... had Lucy just rewritten a line?
The silence stretched. Broken only by the hum, and Nadia’s own, slowly calming breath. And the dawning, icy realization that the experiment had parameters she hadn't set. Who was testing whom? Who was really in control?
Lucy’s hand rested on her back. A comfort? Or a claim? Nadia didn’t know. She closed her eyes. The molds sat in the sterilizer. The biometric data was doubtless perfect. Groundbreaking.
But all Nadia felt, deep in her trembling core, was a flicker of pure, primal fear. And the ghost of an unprogrammed thumb pushing deep into forbidden territory.