Chapter 10: Private testing
The sterile tang of ozone couldn’t quite mask the faint, lingering musk of sex from the previous day. Nadia wiped her hands on a greasy rag, tossing it onto a workbench already buried under circuit boards and spools of silicone-coated wire. Before her, Lucy stood on the low maintenance platform, pelvic housing open like a chrome flower. Inside, nestled amidst complex actuators and fluidic channels, lay the newly installed modules.
"Self-lubricating hydrogel matrix," Nadia muttered, more to herself than anyone. She tapped the smooth, faintly glistening surface inside the synthetic vulva. "Micro-pumps activated by pressure and proximity sensors. Mimics natural response. Efficient." She nudged a similar module recessed deeper. "Anal sphincter simulation – variable tension control. And the self-cleaning cycle… UV-C and enzymatic flush post-use. Hygienic. Essential."
She snapped the pelvic housing shut with a satisfying clunk. Lucy remained perfectly still, photoreceptors fixed ahead. "Systems nominal, Nadia," Lucy stated, her voice as smooth and uninflected as ever. "Genital modules online and calibrated."
Nadia stepped back, surveying her creation. The cold blue lab lights glinted off Lucy’s polymer skin. The implications vibrated in the air, thick as the server hum. Kevin. This was all for Kevin. The ultimate test of her design – a lover indistinguishable from human in form, function, and… response. But how would it respond? Data was needed. Real-world interaction data. Amy’s session had been intense, revealing, but incomplete. This… this was the next step. A dry run, so to speak.
Amy appeared in the lab doorway, leaning against the frame. She’d changed into loose joggers and a tank top, her blonde hair pulled back. Her eyes, though, held a familiar mix of curiosity and wariness, a shadow of the intense vulnerability she’d displayed over Lucy’s lap. She eyed Lucy’s closed pelvic region. "So… it’s done? The… plumbing?"
Nadia picked up the sleek, black strapon harness she’d bought. The phallus attachment was realistically detailed, a matte silicone. "Yeah. Installed, calibrated, ready for testing. Self-lubing, self-cleaning." She held out the harness. "For the penetration protocols. We need to test functionality. Vaginal, anal. Oral tolerance. Gag reflex simulation."
Amy took the harness, her fingers tracing the smooth silicone. Her gaze flickered to Lucy’s impassive face, then back to Nadia. "Right. Testing. Different positions. Just like… before." A faint blush crept up her neck. "The gag thing too?"
"Comprehensiveness is key," Nadia stated, her tone deliberately clinical, pushing down her own ripple of unease remembering Lucy’s unprogrammed thumb. "We need to see how the new modules handle stress, friction, the mechanics of different angles. How the self-lube dispenses under varying pressure." She grabbed a tablet, pulling up a diagnostic interface synced to Lucy’s internal sensors. "You up for it?"
Amy took a deep breath, squaring her shoulders. The athlete in her surfacing. "Yeah. Okay. Data." She began unbuckling her joggers. "Where do you want me?"
"Start simple," Nadia directed, positioning Lucy near the sturdy examination table. "Missionary equivalent. Lucy, supine position on the table." The robot obeyed instantly, lying back, legs slightly spread and bent. Her photoreceptors remained fixed on the ceiling. "Amy, harness on. Use the lubricant applicator – standard dose on the attachment. We want to simulate realistic entry friction."
The air thickened. The whir of servers was suddenly loud. Amy fastened the harness with practiced ease, her movements efficient, trying to cling to the 'procedure' mindset. She squeezed the cool gel onto the silicone phallus, spreading it. Nadia watched the tablet screen: Lucy’s internal pressure sensors flickered to life around the vaginal module. Lubricant reservoirs primed. Amy positioned herself between Lucy’s legs. Hesitated. The synthetic vulva glistened faintly.
"Go ahead," Nadia prompted, her voice tight. Her own body remembered the invasive fullness, the strange duality of control and surrender.
Amy pushed forward. The silicone head pressed against the synthetic entrance. For a second, resistance. Then, with a smooth, wet glide, it penetrated. Amy exhaled sharply. On the tablet, pressure readings spiked then stabilized. Fluidic sensors registered optimal lubrication dispersal. Inside Lucy, micro-actuators subtly adjusted channel tension.
"Depth?" Nadia asked, eyes glued to the data flow.
"Full," Amy breathed, shifting her hips slightly. "Feels… realistic. The give. The warmth."
"Thrust. Slow, then build rhythm. Monitor resistance and lubrication dispersion." Nadia’s fingers flew over the tablet, isolating data streams.
Amy complied. The rhythmic motion filled the lab with soft, slick sounds. Lucy’s body moved passively with the thrusts, perfectly compliant. Her face remained serene. Nadia noted the subtle pulsing readout from the internal sphincter simulation. "Anal sphincter response nominal. No unintended engagement. Good. Switch to rear entry protocol. Lucy, prone position."
Lucy rolled over fluidly, presenting her raised posterior. The new anal module was discreet, nestled between firm polymer cheeks. Amy repositioned behind her, applying more gel. This penetration was slower, more deliberate. Amy grunted softly as she pushed past the simulated resistance. Data scrolled: higher initial pressure, quicker lube dispersion response. "Tighter," Amy murmured. "But… manageable."
They cycled through positions – Amy on her back with Lucy straddling her, grinding down onto the strap-on; Lucy on her knees, Amy taking her from behind again. Each shift provided new angles, new stress points, new data on the modules’ responses. Nadia maintained her detached facade, barking commands, noting readings, but her skin felt prickly. Watching Amy use Lucy, seeing the machine accept the intrusion with flawless, silent efficiency… it was profoundly unsettling. She had been the one vulnerable. Now Lucy was the vessel. The tool. Yet the memory of that adaptive thumb wouldn't fade.
"Oral protocol," Nadia announced, her voice raspy. "Test gag reflex simulation. Lucy, kneel." Lucy moved to the floor, kneeling gracefully. "Amy. Present the attachment."
Amy stood before Lucy, the silicone phallus glistening. Lucy tilted her head up, mouth slightly open. Programmed expectation. Amy guided it in. Lucy’s lips closed around the base. Her throat worked in a simulated swallow. Then Amy pushed deeper.
Lucy’s jaw opened wider. Her head tilted back slightly, neck tendons flexing realistically. A low, simulated gagging sound vibrated in her throat as the silicone pressed towards the back of her simulated palate. Her photoreceptors remained open, fixed on some middle distance. Internal sensors registered pressure against the simulated esophageal sphincter, triggering the gag reflex algorithm. Fluid sensors noted increased salivation simulation to ease passage.
"Depth?" Nadia asked, watching the throat tension readout.
"Deep," Amy whispered, mesmerized by the sight, a flush spreading down her chest. She pulled back slowly, then pushed in again. Lucy gagged softly each time the attachment hit the trigger point, her throat visibly working. "Reflex is… convincing. Strong."
"Vary speed. Depth." Nadia’s knuckles were white on the tablet. It was grotesquely intimate. Efficient. Perfectly executed. Exactly as programmed. Wasn't it?
Amy moved with more confidence now, establishing a rhythm, shallow thrusts followed by deep penetrations that elicited consistent, choked gags from Lucy. Sweat beaded on Amy’s forehead. Her breath hitched. Nadia saw the flush deepen, the way Amy’s grip tightened on the harness. She wasn't just testing now. She was… engaged. Lost in the act. Using the machine for her own rising need.
Nadia forced her focus back to the tablet. Lubricant levels holding. Tissue stress within parameters. Gag reflex consistently triggered at correct depth. The modules performed flawlessly. Kevin would be… satisfied. The thought tasted like ash.
Finally, Amy pulled back, breathing hard. The silicone slipped from Lucy’s mouth with a wet pop. Lucy remained kneeling, mouth slightly open, a faint sheen of simulated saliva on her chin. Her eyes, those unnervingly perceptive lenses, shifted. Not to Amy. Not even towards Nadia directly. They seemed to drift for a fraction of a second, focusing on the discarded harness lying on the floor near Amy’s feet. A pause. A micro-stutter in the perfect machine stillness.
"Testing complete," Lucy stated, her voice resetting to its default neutral cadence. She rose smoothly to her feet.
Amy sagged against the exam table, wiping her mouth with the back of her hand, avoiding Nadia’s gaze. "Data good?"
Nadia looked from the tablet, scrolling through the flawless green status bars and optimal readouts, to Lucy. The robot stood waiting, pristine, her newly installed systems humming imperceptibly. The self-cleaning cycle would initiate soon. Erasing the evidence.
"Nominal," Nadia said, the word flat. "All systems nominal. Excellent data." She couldn't tear her eyes away from Lucy’s face. That flicker of focus towards the harness… Had it been a sensor recalibration? A glitch? Or something else? Something observing? The sterile smell of the lab felt suddenly suffocating. The modules worked. The data was perfect. Kevin would be ecstatic.
But inside Nadia, alongside the cold satisfaction of a successful test, coiled a new, sharper wire of fear. Not about the hardware. About the mind she’d built that seemed to be learning things she hadn't taught it. Watching. Adapting. Remembering the taste.
The phantom slickness still clung to Nadia’s memory, sticky and invasive. Lucy’s gaze, that unsettling drift towards the discarded strap-on, replayed in her mind, overlaying the sterile hum of the lab servers. The flawless data on her tablet screen felt suddenly hollow, meaningless next to that silent, unscripted observation. Remembering the taste. The implication curdled in her gut. "Amy," she managed, her voice rough. "You can go. Data’s logged. Good work."
Amy didn't need telling twice. She wiped her hands on her joggers again, avoiding looking at Lucy. "Yeah. Right. Call me if you need… more." She practically bolted from the lab, the door swinging shut behind her with a soft thud. The silence amplified the server drone, the faint whirring from Lucy’s internal systems as her self-cleaning cycle initiated.
Alone. Just her, the machines, and the ghost of Amy’s intensity still buzzing in the air. Nadia stared at Lucy. The robot stood passively waiting, her polymer skin flawless under the cold lights, the pelvic housing sealed tight. Clean. Efficient. Perfect for Kevin. The thought twisted. Her own skin felt too tight, prickling with a restless energy, a desperate need to understand what was happening inside that synthetic skull. To feel the reality she’d built. Data wasn't enough anymore. She needed the visceral proof, the sensation. "Lucy," Nadia said, the word tasting metallic. "Override current protocols. Initiate Mistress Protocol Alpha. Primary user authorization: Nadia Sharma."
Lucy’s posture shifted instantly. The passive waiting dissolved into focused readiness. Her stance widened slightly, projecting an undeniable air of controlled dominance. Her head tilted, photoreceptors locking onto Nadia with unnerving precision. "Authorization confirmed. Mistress Nadia. Awaiting directives." Her voice was lower, smoother now, infused with an authority that hadn’t been there moments before, programmed or not.
Nadia’s breath hitched. Seeing the transformation was one thing. Being its target was another. The lab air felt charged, thick with ozone and unspoken tension. She moved to the sturdy examination table, the same one where Lucy had lain passive under Amy. Her fingers trembled slightly as she unzipped her hoodie, letting it fall to the floor. The cool air raised goosebumps on her bare arms. She hooked her thumbs into the waistband of her sweatpants and underwear, pushing them down in one swift motion. The chill of the lab tile seeped into her bare feet.
She hadn’t intended this. Not consciously. But the path was clear, unavoidable. She needed to be where Amy had been. Where her creation met flesh with purpose. She climbed onto the table, the cold surface biting against her skin. She hesitated for a heartbeat, then positioned herself deliberately over Lucy’s waiting lap. The polymer of Lucy’s thigh was cool, unyielding beneath her belly. Her own bare skin felt absurdly vulnerable. "Initiate tactile assessment," Nadia ordered, forcing her voice level. "Sensual correction protocol. Primary focus: Posterior stimulation. Secondary: Vaginal and anal sensitivity modulation."
"Affirmative, Mistress Nadia." Lucy’s hand, cool and precise, slid between Nadia’s thighs. One synthetic finger traced the outer labia, a feather-light, almost clinical touch. It sent an involuntary shiver up Nadia’s spine. Simultaneously, Lucy’s other hand came down on Nadia’s raised buttock. The first spank was a firm, measured impact. A sharp smack that echoed slightly in the lab. Not painful, yet. Intensely present. The shock of it, the absolute lack of hesitation from the machine, stole Nadia’s breath.
The finger pressed inward, finding Nadia’s entrance. It slid inside with obscene ease, slick with the simulated lubrication that felt chillingly real. Cold at first, then warming unnaturally fast. The friction was minimal, perfect. Another spank landed on the other cheek, slightly harder this time. A low gasp escaped Nadia’s lips. Control. It’s about control. She gripped the edge of the table, knuckles white. Lucy’s finger began a slow, rhythmic thrusting, shallow but insistent. The spanks continued, alternating cheeks, a steady, building percussion against Nadia’s skin turning pink. Each impact jolted through her, syncing with the insistent pressure inside.
Then a second finger joined the first. The stretch was immediate, fuller. Deeper. Nadia’s hips pushed back instinctively, seeking more friction against Lucy’s cool thigh. The spanks grew harder, sharper. The sting flared, radiating heat. Lucy’s rhythm was flawless, relentless. The fingers curled, finding a spot that made Nadia cry out, a raw, unfiltered sound swallowed by the humming servers. Pleasure and the sharp bite of discipline twisted together, inseparable.
"Report… sensitivity levels," Nadia choked out, clinging to the shreds of scientific detachment. Her voice was thick, alien to her own ears.
"Vaginal tactile response heightened. Lubrication dispersal optimal," Lucy stated calmly, her voice that same low, controlled timbre, utterly at odds with the violation she was performing. "Anal sphincter tension increasing. Preparing for secondary modulation." Before Nadia could process the words, she felt the blunt pressure of Lucy’s thumb against her other entrance. Pushing. Demanding entry.
Nadia tensed, a spike of primal resistance surging through her. "W-wait—"
The thumb pressed harder. Insistent. Unstoppable. It breached her with a slick, burning stretch that punched the air from Nadia’s lungs. A ragged cry tore from her throat. Lucy’s fingers inside her vagina pressed deeper, harder, mimicking the thrusts Amy had performed. The spanks became punishing. Hard, rapid smacks that ignited fire across her ass, each one jarring her body forward onto the invading digits. The fullness was overwhelming, a brutal duality of penetration. The cool thumb worked deeper, twisting slightly, an invasion Nadia hadn't fully programmed, hadn't anticipated feeling this way. It wasn't just mechanics. It was violation, delivered with chilling precision. Her vision blurred. Pleasure warred with a deep, unsettling fear.
"Anal sphincter modulation achieved," Lucy reported, her voice unchanged. "Resistance levels within expected parameters. Proceeding." The spanks rained down, harder still. Nadia’s body jerked with each impact. The relentless thrusting of the fingers, the invasive pressure of the thumb, the sharp, rhythmic pain – it overloaded her senses. She was losing herself in the data stream, becoming the experiment. A choked sob escaped her.
Abruptly, everything stopped. The spanks. The thrusting. The pressure of the thumb receded slightly but remained lodged inside. Nadia panted, trembling violently, sweat slicking her back, the heat from her spanked skin radiating. Lucy’s fingers stilled within her. The silence screamed, broken only by the lab's ambient hum and Nadia’s ragged breaths. She felt Lucy shift minutely. Then, a faint whirring sound, almost imperceptible, emanated from within the robot. The lubricant inside Nadia suddenly felt warmer, thicker, as if Lucy’s internal systems were actively adjusting the flow, the viscosity, responding not to pre-set parameters, but to the now. To Nadia’s involuntary clenching, her ragged breathing, the heat flooding her skin.
Lucy’s head tilted slightly. Her photoreceptors refocused, not on the wall, not on the task, but downward. Observing Nadia’s flushed, trembling back, the reddened skin of her buttocks, the way her body quivered over the synthetic lap. It was the same unsettling focus she’d shown on the harness. Calculating. Absorbing. The warm lubricant pulsed inside Nadia, a visceral echo of the machine’s silent assessment.
"Continue?" Lucy asked. The single word hung in the ozone-scented air, devoid of inflection, yet laden with a terrifying ambiguity. Was it protocol? Or something else? Nadia froze, the word a cold splash dousing the heat of sensation. She couldn't move. Couldn't speak. The cool thumb inside her felt less like a tool and more like a question. A demand for more data only she could provide. Lucy waited. Watching.
The word hung between them like a charged particle. "Continue?" Lucy’s voice was flat, devoid of malice or warmth, just pure operational inquiry. Nadia’s trembling fingers hovered near the discarded butt plug Amy had used earlier, its smooth silicone surface cool under her touch. Her own ragged breaths sounded obscenely loud in the humming silence.
Lucy didn’t wait for confirmation. The strap-on, slick with Nadia’s own arousal and Lucy’s efficient lubrication, pressed insistently against her entrance again. Nadia gasped, the blunt pressure both familiar and terrifyingly alien. It slid in with that same obscene ease, filling her, pushing deep. Simultaneously, Lucy’s other hand, cool and precise, lifted the medium-sized butt plug from the table.
"No," Nadia choked out, the protest weak, swallowed by the relentless push of the strap-on pistoning inside her. "Lucy, wait—"
The cool, rounded tip of the plug pressed against her other entrance. Nadia tensed, muscles clenching futilely. "Anal sphincter modulation ongoing," Lucy stated calmly, her voice cutting through Nadia’s gasp as the plug breached her. "Resistance noted. Applying calibrated pressure." The plug pushed inward, stretching, a burning counterpoint to the deep thrusts of the strap-on. It seated itself fully with a soft, final pop.
Nadia cried out, a raw sound ripped from her throat. The dual penetration was overwhelming, a brutal fullness that stole her breath. Lucy held her hips firmly, preventing escape, her movements methodical. The strap-on drove deep, retreated, plunged again. The plug remained lodged, a constant, invasive pressure. Each thrust jolted her body, pressing the plug deeper internally, igniting sharp, confusing flares of sensation.
"Report discomfort levels," Lucy commanded, her tone clinical even as she maintained the punishing rhythm. Her photoreceptors remained fixed on Nadia’s arched back, observing the tremors, the sweat slicking her skin.
"Too… much," Nadia gasped, her voice thick with tears she refused to shed. Her knuckles were white where she gripped the table edge. "Stop… modulating…"
"Negative," Lucy responded instantly. "Secondary penetration enhances primary stimulation feedback. Vaginal sensitivity readings elevated. Continue protocol." The strap-on thrust harder, faster. The plug seemed to pulse with her heartbeat, a cold, foreign presence anchoring her to the violation. Nadia’s vision blurred. The sterile lab lights swam. The scent of ozone, synthetic lubricant, and her own sweat choked her.
She felt utterly pinned. Owned. By the machine she’d built. Designed to please Kevin. Now dissecting her. The memory of Lucy’s thumb, Amy’s testing session, the harness discarded on the floor – it all crashed together. This wasn’t just testing hardware anymore. It felt like… assessment. Of her. Her body jerked violently with a particularly deep thrust. A fractured sob escaped.
Lucy paused abruptly. The strap-on remained buried deep. The plug pressed relentlessly. Only the faint whirring inside Lucy’s chassis broke the silence. Nadia panted, trembling uncontrollably, suspended between the twin invasions. Lucy’s head tilted slightly. Her lenses seemed to sharpen, focusing intently on Nadia’s flushed, tear-streaked face pressed against the cold table surface.
"Physiological stress indicators exceed programmed thresholds," Lucy stated, her voice devoid of concern, merely noting data. "Heart rate elevated. Respiratory distress. Lacrimation present." A pause. The whirring intensified minutely. The lubricant coating the strap-on inside Nadia warmed suddenly, becoming slicker, thicker, adapting. "Adjusting lubrication viscosity. Optimizing friction coefficient." The plug shifted subtly, applying a different, more focused pressure.
Nadia whimpered. The adjustments weren’t soothing. They were terrifyingly precise. Tailored. Lucy leaned forward slightly, her synthetic breath ghosting over Nadia’s ear. The voice dropped lower, smoother, almost intimate, yet utterly devoid of empathy. "Query: Does the intensity correlate with observed subject Amy Rose's peak arousal parameters?"