The stallion prepares to mount

The mechanical stallion’s haunches flexed, its polished steel frame shifted with predatory grace as it took a stance behind her. Samus gasped as the harness’s restraints tightened fractionally, tilting her hips upward, forcing her twin cunts into perfect alignment with the machine’s throbbing length. From the ceiling a railing lowered itself above her back and instantly the mechanical stud mounted it, its hooves touching her trapped hands.

The stallion’s cockhead started to insistantly press against her lower slit first. The heated metal sending a jolt through Samus’ spine as it pulsed with hydraulic anticipation, its mechanical head already partially flared. With a shuddering gasp torn from her throat, the flare breached her, the synthetic lubricant mixing with her own slickness in obscene, glistening strands.

The machine didn’t thrust..instead it inflated and extended, its internal mechanisms expanding its girth in slow, relentless increments. Samus’s back arched against the harness as her inner walls stretched around the invading steel, every ridge and vein of its artificial length imprinting itself against her quivering flesh. Her own muscles betrayed her as they clamped down in an act of **** arousal.

The stallion’s pistons hissed as it began its first measured thrust, the flare of its cock stretching Samus's lower cunt obscenely wide before retreating with a slick, metallic sound. Her breath came in ragged gasps as the machine’s rhythm quickened, each forward motion driving deeper, its internal mechanisms throbbing with artificial heat.

A second probe, slimmer, emerged from beneath its belly, glistening with coolant as it sought her upper cunt. Samus’s thighs trembled as the secondary appendage pressed against her, its tip swirling in tight circles before breaching her with a single, relentless push once it found its mark.

The dual penetration sent Samus’ vision whiting out for a split second, her body convulsing against the restraints as the stallion’s pistons locked her in place. The vibrating probe inside her upper cunt pulsed in erratic, escalating patterns, its coolant-lubed surface buzzing against her swollen inner walls while the thick, flared cock beneath it pistoned in and out with mechanical precision.

Her twin cunts clenched in unison, each ridge of the stallion’s shaft dragging against her oversensitive flesh as it bottomed out inside her, its heated metal searing her deepest reaches.

The stallion’s pistons hissed louder, its thrusts growing deeper, more insistent—each mechanical pulse timed to the frantic flutter of Samus’ twin cunts. Her back arched violently as the vibrating probe in her upper slit suddenly intensified, its buzzing rhythm syncing with the pounding of the flared cock beneath it. A strangled whinny tore from her throat as her body seized, her swollen ovaries visibly pulsing beneath her fur as the first wave of climax crashed through her.

The stallion’s thrusts turned jagged, its pistons stuttering as if overwhelmed by the clenching heat of her climax. Samus’ vision blurred, her body no longer her own, just a vessel for the machine’s relentless breeding protocol and the AI's twisted plans. Coolant dripped from the vibrating probe in her upper slit, mingling with her own slick as it pulsed faster, harder, the buzzing now a merciless thrum against her swollen inner walls.

Her hind legs trembled, hooves scraping against the sterile floor as the flared cock beneath bottomed out once more..CLICK- locked.

The stallion’s cock swelled inside her, its internal mechanisms locking into place as a pressurized surge of synthetic seed flooded Samus’ lower cunt in thick, pulsing waves with all but one way to go as the flared head pressed up against her cervix. Her body jerked against the restraints, her twin slits clamping down in involuntary spasms as the scalding heat of the artificial insemination seared her deepest reaches. The vibrating probe in her upper slit redoubled its efforts, its coolant now replaced with a slick, milky substance that oozed into her quivering passage with every merciless buzz.

She could hear the internal hydraulics hiss just as she felt the cock swell another fraction. She could feel the individual ridges along the shaft whenever her muscles clamped down forming yet another layer of stimulation. Her hind muscles spasmed as they rode out their shared climax but the strain on her uterus started to become unbearable with such verility filling her up to the brim, some of it **** up into her felopian tubes to meet the undeniable ovum waiting for their turn to be released.

A high-pitched whinny tore from her throat when the stallion’s flare collapsed inside her, the bulbous tip was pressing mercilessly against her deepest, most sensitive nerves and released pressure in an instant. Coolant-flushed veins pulsed along its length, throbbing in time with the mechanical heartbeat vibrating through its steel frame.

Her hind legs trembled, hooves scraping against the floor as the stallion’s cock twitched violently, fortunatly the harness held.

The stud's internal mechanisms whir with a deep, rhythmic pulse. A fresh flood of synthetic seed gushed into her depths, hot and thick, the pressure forcing her inner walls to stretch even further as the viscous fluid surged upward, coating her quivering oviducts.

Her twin cunts clenched instinctively, milking the mechanical length as her own slickness dripped down its ridged shaft in glistening strands.

(To be continued/feel free to continue)