Chapter 1: Sanitized for His Use
Me and David meet in the shower. Without a word, he's replacing the shower head with the enema nozzle. Being a good fuckdoll, I bend over and pull my cheeks apart.
The cold metal touched my anus, sending a shiver up my spine. Then David slowly pushed the bulbous head into me, a stretching fullness that made my breath hitch and my knees buckle. “That’s it, take it all,” David murmured, his voice rough as he pushed the tube deeper, the water beginning its insistent flow.
He chose quite warm water, so I feel the warmth spreading inside me. Of course, he doesn't settle for just pushing it in; he twists and moves the nozzle in and out, a slow, fuck you?”
He works it deeper with a brutal twist that makes me gasp. “That’s my good girl,” he murmurs, his free hand palming my swollen belly. I’m getting filled and the pressure starts rising; my belly inflates and I feel the damp reaction in my pussy, a slick heat that has nothing to do with the shower. “Look at you,” David breathes against my neck, his voice thick with lust. “So fucking perfect and full just for me.”
The water kept coming, a relentless, warm rush that forced its way deeper, and I whimpered as my insides distended, heavy and achingly full. "There she is," David groaned, his hand moving from my belly to roughly stroke my clit, "getting stuffed like the filthy anal slut you are." A sharp cramp tightened low in my gut, a sweet, punishing pulse that made my vision blur. "You can take it," he whispered, biting my shoulder as he gave the nozzle another cruel twist. "Just you wait."
The water kept coming, a relentless invasion that stretched me obscenely wide around the cold metal. I felt my body reaching its limit, a trembling, overfilled resistance that made my toes curl against the wet tiles. A guttural groan ripped from my throat as the pressure peaked, and then a hot, silty stream of water suddenly jetted out around the nozzle’s sides, spattering against the shower wall with a messy, shameful sound.
“Fuck yes,” David snarled, yanking the nozzle out in one brutal motion.
The emptiness was instant and shocking, a gasp of cold air against my ravaged hole. But before the pent-up torrent inside me could escape, he was on me. I felt the blunt, insistent heat of his cock, slick with my own arrousal, pressed against me. He didn’t ask, didn’t tease. With a fierce, grunting shove, he buried his entire length in one punishing stroke, his pelvis slamming against my ass cheeks, corking me shut.
A strangled scream tore from my lips, part agony, part ecstasy. The locked-in water sloshed violently inside me, a heavy, churning counterpoint to the thick stretch of his dick. “You’re so fucking deep,” I panted, my forehead pressed to the cold tile.
“Made for it,” he growled, his hands gripping my hips hard enough to bruise. He didn’t wait for me to adjust. He just started fucking, short, ruthless pistons of his hips that kept me utterly impaled. Each drive sent waves of pressure through my swollen belly, a filthy, internal sloshing that made me dizzy. “Feel it? That’s all mine, sloshing around while I own this ass.”
I could only whimper in reply, my mind white noise and my body a vessel for his use. The water inside me, trapped and pushed by his thrusts, became a secondary presence, a secret, sloshing shame that heightened every sensation. His pace quickened, the sounds of our bodies slapping together echoing off the porcelain. “Gonna keep it locked in you ‘til I come,” he promised, his breath hot on my neck. “Then you can finally fucking burst.”
His thrusts were a relentless, brutal cadence that shook my whole body against the wall. "You feel that water moving?" he grunted, his voice strained. "My cock’s churning it inside you." I could only nod, my moans stolen by each jarring impact. The sloshing inside me was a vile, exquisite torture, a secret kept by the tight seal of his body against mine. "Fuck, David," I choked out.
"Tell me you want it." His pace became jagged, desperate. "Tell me you want my come in this dirty, water-filled ass."
"I want it!" The words were a ragged scream. "Fill me, please—"
He reached around me, kneading my clit while fucking us both to orgasm. His calloused fingers worked in fierce, punishing circles, a direct counterpoint to the deep, claiming drive of his cock. The dual assault tore a climax from me that was less a wave and more a seizure, my internal muscles clamping around him in frantic, milking pulses. I felt him swell, then erupt with a guttural shout, his heat flooding my colon just as my vision whited out. The scalding rush of his release was the final trigger. As his thrusts slowed to a deep, satiated grind, the pressure gave way. A hot, violent torrent finally burst free from me, splattering down my thighs and his, an obscene release that left us both trembling and spent against the slick tiles.
For a long minute, there was only the sound of our ragged breathing and the drip of the shower. He slid out of me slowly, a final, hollow ache. We dried off with a rough, gray towel that smelled of him, the coarse fabric scraping my oversensitive skin. Wordlessly, he took my hand and led me, naked and shaking, down the dark hall to the bedroom. The air was cool on my slowly drying skin. He went to the closet, rummaging in the top shelf where we kept the things we used less often. I heard the soft clack of the hemp coils before he turned, a length of dark rope in his hands. My pulse, which had begun to slow, hammered back to life. Without a word, I went to the lower end of the bed. I assumed a kneeling position, then lay my upper body down on the cool mattress, arching my back to present myself. I placed my hands behind my back, wrists together, a silent offering. My heart thumped against the mattress. "Tie me," I begged, my voice a raw whisper in the quiet room. He knelt behind me, the rope whispering through the air before I felt its first rough kiss against my inner wrist. He looped it tight, a precise, firm knot that bit deliciously into my skin. He took his time, weaving the rope around both wrists, binding them together securely, utterly. Each pull tightened the restraint, each pass of the rope a promise. I tested the bonds, a frantic little pull that got me nowhere, and a shudder of pure need went through me. He finished with a final, expert knot, his fingers brushing my ass. "Good?" he asked, his voice low. "Perfect," I breathed, already pushing my hips back, seeking empty air.
David traced a finger down my spine. “Wait,” he said, his voice shifting from lust to something softer, intrigued. He walked around to the side of the bed where a small, sleek case sat. He opened it and pulled out something that looked like dark, liquid metal pooled around a slender rod. “I’ve been working on this at the lab for months,” he said, holding it up. It seemed to subtly shift in his grip, like a living thing. “It’s aquaphobic, doesn’t stick to anything. It’s a kind of mechanical muscle. Can take any form, any size.” He put on a pair of thin, smart-glasses, his eyes flickering with a faint blue light. “The ultimate sex toy.” He placed the cool, rod-like form loosely between my exposed cheeks. It felt inert, waiting. Then it began to move.
I could feel the form change: two extremities grew from the rod, pushing my cheeks firmly apart. The main form aligned itself with my waiting asshole, narrowing to about a finger's girth. Then it pushed into me. The stretch wasn't painful, but absolutely unforgiving. Nothing could have prevented the thing from entering me. It was a combination of locking and flowing; resulting in the thing penetrating me to about a centimeter's depth.
It stopped there, a cold, alien presence lodged just inside my rim.
“Initial penetration achieved. Neural feedback link stabilizing.” David’s voice was different now, a detached monotone as he watched the data in his glasses. “Sensory interface is live. I can feel what you feel.”
A jolt went through me, part fear, part unbelievable arousal. “You can… feel this?”
“The pressure. The heat. The exact level of stretch.” He adjusted something in the air, a gesture I couldn’t see. “Now. Deeper.”
The thing moved again. It didn’t thrust. It extended. It was like being fucked by a slow, relentless tongue that never needed to breathe. The silky, unyielding material advanced an inch, then two, the sensation utterly unlike anything human. There was no pulse, no vein, no softness. It was a perfect, smooth invasion.
“Oh, god,” I moaned into the mattress, my bound hands twisting against the rope.
“Fascinating. The internal sphincter just yielded. No resistance.” David’s clinical tone was the hottest thing I’d ever heard. The thing inside me curled slightly, a subtle bend that pressed against a spot so deep I cried out. “That’s it. There’s the spot.”
It began a rhythm then, a slow in-and-out glide that was mechanically precise. Each withdrawal was almost complete, leaving me clenching around emptiness before it flowed back in, a fraction thicker each time. The stretch mounted, a building, radiant ache that melted my bones.
“Make it harder,” I begged, my voice muffled.
“Harder isn’t the variable.” I heard him step closer. “Density is. Watch.”
The toy went still, buried to what felt like its hilt. Then, it began to vibrate. But not like any vibrator I’d ever known. It was a low, subsonic rumble that seemed to resonate in my marrow, shaking me apart from the inside. My vision spotted. A guttural sound, pure animal need, tore from my throat. The rumble climbed in frequency, becoming a furious, buzzing intensity that turned my nerves to live wires.
Just as I was certain I’d shatter, it stopped. The sudden silence was a physical shock.
“David, please—”
“Shhh. The next phase is structural.” His hand rested on my lower back, a point of human warmth against the cold, intelligent thing inside me. “It’s going to change shape.”
I felt it thickening, the smooth surface developing a subtle ridge. Then another. A defined, rhythmic pattern began to form along its length. My breath hitched. It was becoming… knotted.
The first bulbous swell pressed against my entrance, a significant, impossible challenge. My body tensed instinctively.
“Relax,” David commanded, his finger circling my oversensitive rim where the toy met my skin. “You can take it. You were made for this.”
The toy pushed forward. It was a brutal, stretching conquest. I screamed as the first knot popped past my resistance, a searing, glorious fullness that stole my breath. It didn’t stop. It dragged the thickened node slowly, agonizingly deep, before the slender stem behind it followed. I was so full I could feel it in my throat. Before I could adjust, the second knot was at my gate.
“Fuck! David, it’s too—”
“It’s not.” His voice was iron. “Take it.”
With a sob of utter submission, I bore down. The second knot breached me, a breathtaking violation that sent tears streaming down my face. The toy pulsed softly, a reward, and I came instantly, a sharp, convulsing orgasm that ripped through me with no direct clitoral touch, just the sheer obscenity of being filled. My insides clamped down on the knotted length, milking it, and I felt a corresponding tightness in David’s breath.
“Beautiful,” he whispered, data forgotten. “Now, it’s my turn.”
He moved quickly. I heard the tear of a foil packet, the rustle of his jeans. The bed dipped behind me. He didn’t remove the toy. He guided himself beneath it, the broad head of his cock nestling against my soaked, neglected pussy. He pushed in with one smooth, deep stroke, filling the other channel completely. I was impaled in both holes, stretched beyond reason, a human knot between them.
He gripped my tied wrists, using them as leverage, and began to fuck me with slow, deep rolls of his hips. Each thrust drove the knotted toy deeper into my ass, then dragged it back. The dual sensation was mind-breaking. I was a being of pure sensation, a conduit for pleasure so intense it bordered on pain. The sounds were filthy: the wet slap of his skin against mine, the slick squelch of my pussy taking him, the soft, unnatural glide of the toy.
“You feel that, Bianca?” he growled, his rhythm losing its precision, becoming animalistic. “Both of us… fucking this perfect ass… at the same time.”
I couldn’t speak. I could only moan, a continuous, broken sound. The toy began to vibrate again, a lower setting this time, a pervasive hum that melded with the pounding of his thrusts. The third orgasm built, not a peak but a plateau, a sustained state of electric ecstasy.
David’s movements grew frantic, his breaths hot gusts on my back. “Gonna come,” he grunted. “Gonna fill you up.”
His final, deep thrust buried him to the hilt. I felt him pulse inside me, the hot jet of his release, and that sensation, paired with the relentless vibration and the deep fullness, tipped me over a final edge. My whole body convulsed, seized by a climax that felt endless, wracking sobs escaping me as he collapsed over my bound form.
We lay there, a tangled, sweat-slick heap, the toy still humming softly inside me. After a long moment, he reached between us. I felt the toy shift, losing its form, becoming fluid and retreating from my body in a slow, oozing slide. The emptiness it left was cavernous.
He pulled out of me gently, then worked at the knots on my wrists. The blood rushed back into my hands with a painful, tingling warmth. I rolled onto my back, staring at the ceiling, utterly destroyed.
David removed his glasses and set them on the nightstand. He looked down at me, his eyes soft, human again. He traced a finger over my cheekbone, wiping away a tear.
“Still addicted?” he asked, a faint smile playing on his lips.
I reached for him, pulling him down for a kiss that tasted of salt and him. My voice was a rough, used thing.
“More than ever.”