Chapter 3: The Machine's First Lesson
The hot water from the lab shower did little to soothe the deep, pleasant ache David had left in me. It was a persistent echo, a reminder of how thoroughly I’d been used. He’d toweled me off with a roughness that felt like ownership before handing me a clean lab coat. I wore it now, naked underneath, the stark white fabric brushing my thighs as I followed him deeper into his workspace.
The main lab area was orderly, but here, in the back, was his sanctuary of chaos. Schematics were taped to every wall, covered in his tight, angular script. Components I couldn’t name spilled from open containers. And on a central workbench, under a pool of focused LED light, it rested.
The prototype didn’t look like much at first glance—a matte black console about the size of a briefcase, with a single, organic-looking appendage coiled beside it like a sleeping serpent. The material was wrong, though. It wasn’t rigid plastic or cold metal. It was a dusky, semi-opaque silicone, and as the light hit it, I could see subtle, complex structures within, like vascular networks or circuit boards fused into flesh.
“You said it learns,” I said, my voice still a bit rough.
David stood beside the bench, his fingers hovering over the console with a lover’s tenderness. “It does. The silicone is embedded with a lattice of micro-sensors. Pressure, temperature, galvanic response. It doesn’t just move. It listens.” He tapped a key, and the coiled appendage shifted, a smooth undulation that was unnervingly alive. “It refines its approach based on your body’s feedback. In theory, it can become the perfect fuck.”
A thrill, cold and sharp, cut through the warmth of my afterglow. “Perfect?”
“Infinitely adaptable. Patient. Relentless.” He looked at me, his eyes reflecting the cool light of the screen. “It will map you, Bianca. Every twitch, every clench, every spike in your pulse. It will learn what makes you gasp, what makes you beg, what makes you come. And it won’t stop until it has the data.”
He didn’t ask if I wanted to. We were past that. This was the next step.
“Assume the position,” he said, nodding toward a modified gynecological chair I hadn’t noticed in the corner. It was upholstered in black vinyl, with heavy, articulated restraints at the wrists and ankles. It looked less clinical than the steel table, more intimate, more purpose-built for long sessions.
I walked to it, the lab coat whispering around me. I shrugged it off, letting it fall to the floor. The air was cool on my skin. I climbed onto the chair, the vinyl clinging slightly to my damp thighs. David approached, his movements methodical. The restraints were wide, padded cuffs. He fastened my ankles first, spreading my legs wide. Then my wrists, pulling my arms slightly back and out, presenting my body like an offering.
He connected a small, wireless node to the inner flesh of my wrist. “Biometric telemetry,” he explained. “So I can monitor your stress levels. Safety first.” His smile was a thin slice.
He turned back to the console. His fingers danced across the interface. A low, resonant hum filled the room, emanating from the black box. The appendage uncoiled.
It was thicker at the base, tapering to a blunt, rounded tip. As it moved, it did so with a liquid, boneless grace that no machine should possess. It slid across the floor, then up the leg of the chair, the silicone warming as it went. It knew where it was going.
It nuzzled against my inner thigh, a slow, probing press that was almost curious. I jumped at the touch—it was warm, almost body temperature, and faintly sticky, like living flesh. It traced a path through my folds, slicking itself with my arousal, which was already pooling in response to the sheer violation of its intelligence.
“Begin baseline penetration sequence,” David said, his voice quiet, absorbed. “Anal primary.”
The tip found my asshole. It didn’t push. It pulsed. A gentle, rhythmic pressure that mimicked a tongue, but firmer. My sphincter, still loose and sensitive from David, yielded almost immediately. The rounded head pressed inward, an inexorable, smooth invasion.
It wasn’t like David, or the knotted toy. There was no tearing urgency, no brutal claiming. This was a slow, perfect filling. It kept pushing in, inch by impossibly deep inch, its girth consistent, its movement seamless. I could feel every millimeter of its travel, a slick, heated fullness that stretched me with precision. It didn’t stop until it was buried to what felt like its base, a profound occupancy deep in my gut.
“Oh, fuck,” I breathed, my head falling back against the headrest.
It remained still, fully sheathed. For ten seconds, twenty. It was just… there. A presence. Then, it began to move.
The withdrawal was just as smooth, a slow, dragging slide that left me hollow. The thrust back in was a perfect echo of the first, same speed, same depth. It established a rhythm: a measured, piston-like fuck that was maddeningly consistent. It was filling, it was intense, but it was… mechanical. Predictable.
I looked at David. He was watching the screens, frowning. “Minimal fluctuation in heart rate. Galvanic skin response stable.” He made an adjustment on the console. “Increasing synaptic variance.”
The next thrust changed. It didn’t just slide in. It twisted slightly as it entered, a corkscrew motion that rubbed against every nerve. I gasped. On the next withdrawal, it dragged harder, slower, making me feel the full, delicious friction. Then it thrust back in faster, angling differently, hitting a new spot.
It was learning.
It began to vary its pace, its depth, its rhythm. It would plunge deep and hold, pulsating softly, then retreat almost completely and flick rapidly at my entrance. It was exploring, experimenting. Each new pattern was a question, and my body was the answer. A gasp was a positive data point. A moan, a clench, a shudder—it catalogued them all.
“Heart rate escalating,” David murmured, a note of fascination in his voice. “Variance pattern Delta is eliciting strong response.”
Pattern Delta was a cruel, beautiful thing. Three shallow, rapid thrusts, then a deep, slow one that buried it to the root and vibrated. Again. And again. It was building an ache inside me, a coiled tension with no release, because it wasn’t touching my clit, it wasn’t giving me that focal point. The pleasure was diffuse, deep, and maddening.
“David… please,” I heard myself whimper.
“It hasn’t finished its initial mapping cycle,” he said, not looking away from the screen. “It needs a comprehensive dataset.”
The appendage pulled almost all the way out. I felt the cool air on my wet, stretched ring. Then, with no warning, it thrust back in with a force that mimicked David’s earlier ferocity. My cry was sharp, broken. It followed with a series of these deep, punishing strokes, each one knocking a sound from my throat. Just as the pain began to crest into something else, it switched again. Back to the slow, twisting fills. The tease.
It was playing me. I was a instrument, and it was learning exactly how to pluck each string.
Tears of frustration and overwhelming sensation leaked from the corners of my eyes. I was dangling on a edge it refused to let me fall from. I was bucking against the restraints, trying to grind against something, anything, to get the friction I needed.
“It’s identified a threshold,” David said, his voice tight with excitement. “Initiating overload protocol.”
The appendage suddenly thickened inside me. Not much, but enough to make me feel stretched past my limit. At the same time, from its base, a second, thinner tendril emerged. It slithered up my perineum, seeking. It found my clit, not as a nub, but as a flat, broad pad. It covered the entire area, and then it began to pulse. The sensation wasn’t vibration. It was a perfect, rhythmic compression, a mimicry of a tongue fucking me there, synchronized with the deep thrusts of the main shaft in my ass.
The dual assault was instantaneous and catastrophic. The carefully built, denied tension shattered. My orgasm ripped through me with a violence that made my vision whiten. I screamed, my body seizing against the restraints, back arched so sharply the vinyl creaked. The machine didn’t stop. It maintained its rhythm, its pace unchanging, fucking me through the convulsions, prolonging them into a near-painful eternity of raw sensation.
When it finally, slowly, withdrew both tendrils, I was a shuddering wreck. Sweat soaked the vinyl beneath me. My lungs burned. The hollow ache it left behind was profound.
The hollow ache it left behind was profound. It wasn’t an emptiness, but a shaped space, a negative imprint of the thing that had been inside me. I sagged against the restraints, my sweat cooling on the vinyl, listening to the faint whir of the machine powering down. David’s fingers were on my wrist, removing the biometric node. His touch felt distant, human.
“Initial mapping complete,” he said, his voice clipped with professional awe. “The neural feedback loops are… exquisite. You peaked at 147 beats per minute.” He unfastened my ankles, the release a shock of cool air on my heated skin. “How do you feel?”
“Ruined,” I whispered, but a smile touched my lips. “In the best way.”
He helped me sit up. My body felt liquid, disassembled. I watched as he went to the console, his back to me. He was studying the waterfall of data scrolling across the main screen. The tendril lay inert on the floor, a dead thing again. “It’s ready for phase two,” he said, more to himself than to me. “The symmetrical overload protocol. It’s theorized that simultaneous, mirrored stimulation can induce a state of continuous climax. A loop.”
I stood, my legs trembling. The lab coat was still on the floor. I left it there. “You’re not done with me?”
He turned, his eyes gleaming in the low light. “It’s just starting to learn, Bianca. The preliminary data is good, but it’s basic. Instinctual. The next sequence incorporates bilateral input and… connective feedback.” He gestured to the chair. “Again. Please.”
A deep, throbbing pulse echoed between my legs. The ache wasn’t a complaint. It was an invitation. I climbed back onto the chair, the vinyl now warm from my body. He secured the restraints again, but differently this time. He spread my legs wider, locking them in place with my knees bent and elevated. My pussy and ass were utterly exposed, vulnerable and glistening.
“This will be more intense,” he said, attaching fresh nodes to my inner thighs and lower abdomen. “The feedback is direct. Unfiltered. If you need it to stop, say ‘threshold’. The safeword.”
I nodded, my throat tight. The word felt silly here, amidst the sterile machinery and his clinical focus. ‘Threshold’ was what I was chasing.
He activated the console. The hum returned, deeper this time, vibrating in my teeth. From the base of the main unit, two identical tendrils emerged. They were slightly thinner than the first, more agile. They moved with that same liquid intelligence, slithering across the floor toward my splayed body.
They didn’t hesitate. One tip found my ass, still loose and slick. The other found my pussy, nudging at my swollen lips. They aligned themselves. I held my breath.
After a few seconds pause, both tendrils closed in again.
They pushed in unison. The sensation was immediate and doubling. My ass accepted the familiar fullness, a sweet, stretching burn. My pussy, more sensitive, clenched around the invading pressure, a shock of intrusion that was somehow welcoming. They slid deeper in perfect sync, a slow, twin penetration that filled me completely. They continued until my G-spot had been reached.
A soft, tingling vibration started deep inside my pussy, right where the tendril tip pressed against that spongy, internal crest. It wasn’t the rough pulse from before. It was a precise, electric buzz.
Then I could feel an electric current being transferred from the tip right into my G-spot.
It was a sharp, bright jolt, pain and pleasure fused into one white-hot point. It sparked through the flesh, a live wire igniting my nerves.
Through my flesh to the second tip deep inside my anal cavity.
The current jumped. I felt it travel—a distinct, sizzling pathway through the thin membrane separating my two filled channels—and explode in the tip buried in my ass. The sensation echoed, mirrored, a circuit completed inside my body. I cried out, a short, punched sound.
The tendrils didn't move. Just as the filling feeling threatened to fade, it happened.
Next I felt my sphincter being stretched as a bubble formed at the exact spot and started traversing inside.
A swell, a knot, materialized from within the tendril in my ass. It wasn’t moving forward. It was being born right at my entrance, a bulbous expansion that made my ring strain around it. Then, with a soft, inexorable pressure, it began to travel inward, pushing deeper along the shaft already inside me.
While the next one formed at my sphincter.
Before the first internal knot had fully passed, a second bubble began to form at my stretched opening, ready to follow. I felt like a knotted dildo being perpetually pushed inside me without ever leaving again.
It was a continuous, rolling stretch. Just as one knot finished its journey, burying itself deep, the next was already entering me, a relentless, marching fullness that never paused. My cunt was a weeping mess, my ass was being fucked by a living, thickening rope.
Then, the same happened in my pussy, just counterwise.
The rhythm was a brutal, perfect opposite. The pussy-side would create a bubble when the ass-side one had just left. They moved in a hellish, alternating rhythm. A knot would press into my pussy, a thick, dragging bulge rubbing against my G-spot with agonizing slowness, while my ass was being stretched by its own traveling swell.
Every time a bubble reached my G-spot, it would trigger the electric pulse.
The world dissolved into raw sensation. The knots moved with a slow, torturous pace. Each one, in both holes, would eventually press directly onto that electrified spot. When the pussy-knot arrived, the current fired, a searing blast of pleasure-pain. A moment later, as the ass-knot ground past the same internal point, the transferred charge would detonate again, a deep, internal lightning strike.
There was no beginning or end. It was a loop, a circuit of stretching fullness and electric shock. My orgasm wasn’t a peak; it was a plateau, a sustained scream of my nervous system. I was no longer Bianca. I was a conduit. My back arched so violently I heard a joint pop. My throat was raw from sounds I didn’t recognize.
David’s voice cut through the static. “She’s spiking. Look at the waveforms. It’s a perfect harmonic.” He wasn’t talking to me.
The machine didn’t tire. It didn’t vary. It was perfect. It was hell. It was paradise. Tears streamed down my temples into my hair. I wanted it to stop. I never wanted it to stop.
The machine’s rhythm was a god, and I was its willing, shattered altar. My consciousness had dissolved into the electric loop of stretching knots and searing charge. A screaming static was all that was left of my mind.
Then, a new pressure on the chair. David’s weight. The machine’s tendrils never faltered in their brutal, perfect rhythm.
He climbed up my body, his knees framing my ribs. The clinical gaze was gone, replaced by something feral and possessive. He looked down at me, my face slick with tears and spit, eyes probably wild.
“Look at you,” he growled, his voice rough. “The data stream is beautiful. A perfect harmonic fuck-wave.” He palmed his cock, already painfully hard again. “But I need to taste it.”
He leaned forward, not towards my mouth, but to kiss me. It was a savage, claiming kiss, all teeth and tongue, stealing my ragged breaths. He tasted like copper and sweat. When he pulled back, his eyes were dark holes. “It’s doing the work, but this,” he said, shifting his hips, “this is mine.”
The blunt, swollen head of his dick nudged against my parted lips. I opened my mouth, a silent, desperate invitation. He didn’t gently push. He shoved.
He filled my throat in one ruthless thrust, the crown hitting the back with a brutal familiarity. My gag reflex convulsed, tears springing fresh, but the sensation was just another layer in the symphony of overload. The machine kept pulsing and knotting my cunt and ass. David’s hands gripped the sides of my head, his fingers tangling in my sweat-soaked hair.
He withdrew, dragging his length over my tongue, then slammed back down. “That’s it,” he grunted, his hips finding a ragged, human pace. “Take it. Your body’s singing for the machine, but this throat is all mine.”
In. Out. A brutal, piston rhythm that scraped my soft palate. Each thrust muffled my choked sounds, my nose pressed into the coarse hair at his base. I could smell his musk, a vital, animal odor cutting through the lab’s sterile scent. The dual violation was absolute—machine-fucked below, man-fucked above.
My world narrowed to the two points of invasion. The rolling, electric knots inside me built towards another crescendo. David’s cock hitting my throat seemed to sync with the deepest internal pulses. He was fucking my face with a desperate, jerking intensity, his balls slapping against my chin.
“Gonna come,” he warned, his voice strangled. “Gonna feed you everything while that thing milks you dry.”
His words tipped me over. The orgasm that tore through me wasn’t a wave; it was a continent breaking apart. My whole body seized, a rigid arc against the restraints. A guttural, choked scream vibrated around his shaft buried in my throat.
And I squirted.
It wasn’t a trickle. It was a hot, violent rush, a geyser of fluid that pulsed from me in time with the machine’s electric shocks. It sheeted out, soaking the vinyl beneath me, a continuous, gorgeous flood that seemed to have no end. My muscles convulsed around the tendrils, milking them, my vision spotting.
Feeling my drenching climax, David lost all control. He buried himself to the root and held there, his groin pressed against my lips. A hot, salty pulse hit the back of my tongue. Then another, thicker surge. He groaned, a long, shuddering sound of release, fucking my mouth gently now as he emptied himself in deep, spurting jets.
I swallowed instinctively, each gulp a mixture of effort and submission. He finally slid out, softening, glistening with my saliva. He looked down at the mess between my legs, at the machine still gently working my exhausted, pulsing holes, then back at my wrecked face.
“Perfect data,” he whispered, breathless.