The Point of No Return
Even after I'd cum on her stomach—my so-called rational release—our kiss lingered on for ages before we finally pulled apart. I stared at her abdomen, smeared with semen. ...I'm going insane. The blanket's gotta go in the trash. My cock, which had wilted just a little, was swelling back up already. I drew in a deep breath. No matter what, not in this state. Nothing was certain, good or bad. Even pulling out wasn't a risk I could ignore.
With her eyes squeezed shut tight and her hips twitching uncontrollably, I slid off Gyeo-ul and tore open the condom I'd tossed on the desk. Honestly, earlier anxiety had kept me from going all out. Not sure if it was because it was our first time. But wearing one would put my mind at ease.
"Gyeo-ul."
"Ah, yeah...?"
"Get on your stomach."
I gripped her quivering side and lifted gently; she obediently flipped over, baring her ass. I tossed her the pillow beneath her, and she buried her still-closed eyes in it. ...Not sure what she's so shy about.
This time, I rolled the condom on carefully, avoiding any lube on my hands. Then I straddled her thighs and slid my cock between her ass cheeks. ...This won't cut it. Not even close. I'd cum that hard; it should've been enough. But my lust wouldn't be sated.
"Lift your hips a bit."
"...Oppa."
"What."
"That's... embarrassing."
"...Why?"
"B-because... you'll see it."
"I already saw everything earlier."
"Not that... something else."
"...You said no more sibling talk."
"Still..."
"Lift 'em."
A bit more forcefully, and her ass angled up. Right away, both holes came into full view. ...Ah, that's what she meant. But I wasn't that interested. My eyes flicked straight to her pussy instead. I carefully spread her thighs and cheeks apart; the inner flesh looked a shade redder than before. Luckily, no real damage.
"Ha, uh...!"
Ignoring her embarrassed whimper, I stared openly. Soaking wetter than before, the thin slit that had divided the center now torn into a single lewd hole—still tight, but vulgar enough that the word fit perfectly. Gyeo-ul's pussy.
"Gyeo-ul."
"...Yeah."
"Sorry, but I'm not calming down at all."
"..."
"...You good with that?"
"..."
No answer, just clutching the pillow and nodding. ...Haa. I swallowed hard, smacking my lips. I was rock-hard again, at my limit. I wedged my cock into the gap between her thighs. Gripping her hips, I squeezed with my arms, stroking myself tight. It didn't take long to stiffen up like before. I pulled out, gripped my shaft, and rubbed it against the slick entrance. Maybe from all the fluids, or the lube not dried yet—it sucked me right in effortlessly.
I dipped just the tip in and out, over and over. Muffled cries echoed from the pillow each time. Her toes curled restlessly; once I confirmed that, I thrust in deep from behind without mercy. Her moan mixed pain and pleasure.
"Hah, ah, agh...!"
Our asses and pubes slapped together as she braced on her elbows, upper body hunched. I rocked my hips slowly, but hard enough for flesh to smack flesh. When I pressed down, her hips sank; when I pulled back, her ass followed eagerly. I licked her neck and ear in reward, drawing out more moans. Her senses seemed a bit dulled, but better than the anxiety.
"Ah, a-ah... ugh, mmh... o-oppa...!"
"Hoo... what."
"I-it hurts...!"
"...Slower?"
"N-no, not that... it stings... rubbing."
"...The condom?"
"..."
I paused, but she just nodded silently again. ...Fuck. No more holding back. I wasn't thinking with my brain right now. One slip, and I'd fuck up for real. Didn't feel right to go deeper, so I kept moving. But even whimpering, she wouldn't shut up.
"No. I might mess up."
"I-it's fine, really... ngh...!"
"...What?"
"A few days ago... heh, that thing... ngh...!"
"..."
"No problem... ngh, probably... haa, ah...!"
I slammed in balls-deep, the tip catching. My cock twitched inside her. ...Fuck. Tried to hold back, but no dice. Pharmacy's probably closed anyway. Fuck it. One pill tomorrow should cover it.
"Gyeo-ul."
"...Ugh, yeah."
"...I'll get you the pill tomorrow. Take it."
"Yeah, ah...!"
I whispered in her ear, then slowly withdrew from deep inside. Her walls clung, dragging along my shaft. When I pulled out fully, watching it snap back neat was too fucking hot. ...Your fault. You've snapped every last thread of my reason.
I peeled off the condom. My cock throbbed desperately, begging to cum. Bare, I pressed to her entrance again. It sucked me in smooth as ever. Flesh met flesh directly, clinging greedily. Watching it chew me up, my control slipped further. ...Ah, fuck, this is insane. Did I get cheap-ass condoms? The difference is night and day. Fucking bastards.
"Hng... ah... haa...!"
I grabbed her hips, pounding her raised ass with sharp pang-pang slaps. Last shred of restraint kept my pace from going full piston, but I buried it root-deep, like I might crush her insides. If not for the first load, I'd have blown already. ...Fucked up my habits. What now, shit.
"Haat, ah, ang... haa... uh... oppa...!"
"...What."
"K-kiss... me...!"
This naughty sister, spouting nothing but lewd shit—I crushed her under me. Her hovering ass slammed into the bed. Her flailing calves pinned under my legs. I flattened her completely, gripped her head, turned it to me. Her melted face, sweat-matted hair, searching mouth—I fed it my tongue, and she lapped eagerly. Still prone and squashed, I shoved a hand under her, mangling her flattened tits. Pinching her nipples relentlessly made every inch of her skin writhe.
"Heup, hek... hngh, hng... ah...!"
Lower body grinding lower body, she started panting hard. That sound drove me mad with lust. I tried slowing, but my body wouldn't obey. The pang-pang of slapping flesh grew faster, intervals shrinking. Dangerous. Really gonna cum.
"Ah, ahh... o-oppa...!"
"..."
"Do... ngh, whatever... ah, you want... hng...!"
"Fuck...!"
No dirty words, but pure seduction in her tone. My last grip on restraint shattered. I wanted to ravage this reason right here, conquer her, mark her deep inside. Burning instinct overrode my brain. I slammed my cock into her pussy, sweat spraying the blanket. Built the stimulation relentlessly for release. My tip battered her deepest spot over and over. Roughly kneading her tits, I flooded her womb with my pent-up load.
"Ha, ah... hek... he... hoo...!"
"Hoo... ha... fuck, haa...!"
Buried to the hilt, I clamped her thighs tight. Gyeo-ul curled and uncurled her toes, tickling my soles. ...We're fucked. Not the creampie in my little sister—that I could maybe forget. No, this pleasure... I knew I'd never shake it. That was the real problem.
"...Hng, ugh... love... you...!"
"...Me too."
Those short words hardened my hips again. Staying buried would never end, so I pulled out, knelt back, and checked the mess I'd made. ...Ah, better to stay in. Semen leaked slowly from her sealed petals, endlessly teasing my lust. I'm losing it. Like pouring water on desert sand—thirst unquenched. Stay like this, and I'd rape her again.
"...Water. Be right back."
"Yeah...!"
I bolted from the room like fleeing, rummaged the fridge. Chugged a small water bottle in one go. ...Haa. Coolth spread, heat easing a bit. Tossed the empty, grabbed two fresh ones, headed back with both hands full. Gyeo-ul still buried in the pillow. Set one on the desk, sat on the bed's edge, handed her the other.
"Water."
"...Thanks."
"That's it for tonight... let's sleep. Wash up first."
"Yeah...!"
Truth be told, I wanted more. Pump her full again and again. I could, and I craved it. But it was our first time, and I'd lost it a bit earlier, doing my thing... felt guilty. She looked wiped too. She never even said creampie was okay. My impatience did this. So tonight, hold back. As I forced wholesome thoughts to calm down, Gyeo-ul—still prone, facing the wall—sipped her water and spoke.
"...Oppa, um... y'know."
"What."
"I didn't say earlier... can I now?"
"What is it?"
"Well, actually... I took it. ...Period regulators."
"...What?"
My brain blanked, refusing to process. ...What? Why say this now? No, fuck, after all I'd—
"...For Suneung, started a few days ago...!"
"...Why tell me now?"
"Wanted to see... what you'd do if I didn't...!"
I was shocked that a thread of reason had survived this long. Realizing it snapped it completely, shattering without a trace.