I was sprawled out on my bed in the middle of the afternoon, the house supposedly empty because our parents were out for the weekend. My stepbrother, Liam, left the house to be at his buddy's place, so I figured I had the run of the place. At 22, I was still figuring out my kinks, and this sex machine I'd ordered online with discreet packaging and all, had arrived just yesterday. It was this sleek, adjustable contraption with a thrusting dildo attachment, remote controlled for speed and depth. I had set it up in my room, lubed everything up, and stripped down to nothing, ass up on the bed with pillows propping me.
The machine hummed to life as I hit the start button on the remote, the thick silicone cock about seven inches pressed against my hole. I exhaled slow, relaxing as it pushed in, the motor kicking on with a steady rhythm.
'Fuck,' I muttered, gripping the sheets. It filled me just right, thrusting deep and withdrawing, hitting that spot inside that made my own dick leak pre-cum onto the mattress. I increased the speed, moaning louder, lost in the fuck, my body rocking with each pump. Sweat beaded on my skin, my balls tightening as the pleasure built.
That's when the door creaked open. I froze, eyes snapping wide, but the machine didn't stop fucking me. Liam stood there, duffel bag slipping from his shoulder, his jaw dropping. He was 24, built from years of college soccer with lean muscle, broad chest under his t-shirt, messy brown hair, and those green eyes that always seemed to see too much. We had never been super close because our parents married when we were teens. It was always this awkward 'step' thing, polite but distant. But now? He was staring at my naked ass getting pounded by a machine, my cock hard and dripping.
'What the fuck, dude?' he blurted, but he didn't look away. His face flushed, bag hitting the floor as he stepped inside, closing the door behind him. The machine kept going, thrusting into me, and I couldn't move, paralyzed by embarrassment and the building orgasm.
'Liam, shit... I'll turn it off!' I gasped, fumbling for the remote on the bed, but my arms shook too much. Another deep thrust made me groan, my hole clenching around the dildo.
He hesitated, eyes locked on where the fake cock disappeared inside me. 'Is that... a fucking sex machine?' His voice was rough, curious more than shocked. He picked up the remote from the edge of the bed, thumb hovering over the stop button. 'You been hiding this shit?'
'Please,' I begged, but part of me didn't want him to stop. The humiliation twisted hot in my gut, my dick twitching harder under his gaze.
Instead of shutting it down, he turned it up a notch. The thrusts sped up, slamming deeper, and I cried out, back arching. 'Liam! What the—'
'Looks like you need it bad,' he said, voice dropping low. He set the remote aside and knelt on the bed behind me, his hands on my hips, steadying me as the machine fucked me senseless. 'Been wondering about you, man. Always so quiet, locking your door. This what you do?'
I moaned, unable to form words, the silicone pounding my prostate relentlessly. His fingers dug into my skin, thumbs spreading my cheeks wider, watching up close. 'Fuck, your ass is taking that thing like a pro. You like getting filled like this?'
'Yes,' I admitted, voice breaking. The admission burned, but his touch sent sparks through me. He'd never touched me like this, but now his hands roamed, sliding up my back, then down to grip my ass.
He shut off the machine suddenly, the dildo buried deep, leaving me empty and throbbing. I whimpered at the loss, hole fluttering. 'But a machine can't do what I can,' Liam murmured, pulling the attachment out slow, slick with lube. I felt exposed, gaping slightly, my cum nearly spilling without release.
He flipped me onto my back, my legs spread wide, cock standing rigid against my stomach. His eyes raked over me, hungry. 'You want your stepbrother to fuck you? Been fantasizing about that?'
I nodded, breathless. 'Yeah. God, yes.'
He swiftly stripped his shirt off, revealing toned abs and a trail of hair leading down. Pants dropped, his cock springing free. It was longer than mine, curved up, thick base, already hard and leaking. He grabbed the lube from the nightstand, slicking himself up while stroking my dick with his other hand. 'Gonna make you beg for it first.'
He pushed my knees to my chest, exposing me fully, then leaned in, tongue flicking my hole. I gasped, the wet heat shocking after the cold machine. He licked broad strokes, sucking at the rim, tongue pushing inside to taste the lube. 'Tastes like you need more,' he growled, then added a finger, thrusting alongside his tongue.
'Fuck, Liam—' I bucked, his free hand pinning my hip.
'Quiet. Our parents aren't here, but neighbors might hear.' He added a second finger, scissoring, stretching me wider than the dildo had. His mouth moved up, sucking my balls, then taking my cock deep in one go. I threaded fingers in his hair, moaning as he bobbed, throat working around me. Saliva dripped, his fingers curling to hit my spot, making me see stars.
He pulled off with a pop, lips shiny. 'Taste good, bro. Now, suck mine.' He straddled my chest, cock at my mouth. I opened wide, tongue out, and he fed it in slow, letting me adjust to the girth. 'That's it, take your stepbrother's dick.' I sucked eager, hollowing cheeks, his hips rocking gentle as he face-fucked me. His balls rested on my chin, musk filling my nose.
After minutes of wet slurps, he pulled back, breathing hard. 'Enough. Time to fuck you proper.' He repositioned, knees between mine, rubbing his cockhead against my hole. 'Beg.'
'Please, Liam, fuck my ass. I need your cock inside me.'
He pushed in, the real stretch burning sweet because no machine could match the heat, the pulse. Inch by inch, he sank deep, groaning. 'So tight. Better than that toy.' Bottomed out, he paused, balls against me, then started thrusting slow at first, pulling almost out before slamming back.
I wrapped legs around him, nails digging his back. 'Harder. Fuck me like you mean it.'
He did, pace brutal, bed creaking, skin slapping. His hand gripped my throat light, eyes locked on mine. 'You like getting railed by your stepbro? Dirty little slut.'
'Yes, fuck... don't stop.' Sweat slicked us, his abs flexing with each drive. He hit deep, grinding on my prostate, my cock trapped between us, leaking steady.
He grabbed my wrists, pinning them above my head with one hand, the other stroking me rough. 'Gonna make you cum hands-free.' Thrusts angled perfect, pounding that spot, and I shattered, my ass clenching, cum spurting hot between our bodies without a touch.
Liam growled, thrusts erratic. 'Fuck, milking me—' He buried deep, flooding me with heat, pulsing ropes inside. We panted, locked together, his weight comforting.
He pulled out slow, cum leaking, then collapsed beside me. 'Shit, that was intense.' His arm draped over my chest, fingers tracing lazy circles.
'Yeah,' I murmured, turning to kiss his shoulder. 'Didn't expect... this.'
He chuckled, nuzzling my neck. 'Me neither. But hey, machine's got nothing on the real thing. Round two later?'
I grinned, already hardening. 'Hell yes.'