Overflowing Ecstasy: The First Forbidden Creampie
'Seojun's hugging me.'
[Seojun's POV]
Thwack! Spluuurt!Squiiiish!!

"Aaaah! Cock! Seojun's cock! Uwaaaah!"
Beast-like howls. Ecstasy stripped of all reason. Creak, squeak!Bam! The sofa groaned like it was about to collapse. Slap! Squiiiish—splurt! The tight, sticky walls forged by living flesh. He plunged into them mercilessly.
'I have to save her.' It had started with that single obsession. But.
'This is driving me insane, for real.' The first time feeling a woman's insides. My lower body felt like it was going to burst. Flesh writhing in hypersensitive agony, panting desperately. Thousands of tiny suckers biting and slurping at my shaft like mad. Was there ever a pussy like this in the world? And of all things, it belonged to my sister.
Crunch.Grrrind! He slammed into her cervix. Each time, Seo-ah's hips bucked dangerously, like her back might snap.
"Aaaah! It feels so gooood!! My little brother!! I love you!! Fuck your sister's pussy haaaarder!!!"
Her eyes rolled back white. Froth bubbled from her mouth. The gentle face of my sister, the lofty genius—gone. All that remained was a bitch devoured by lust. Fresh blood smeared across her pale skin. Virgin blood spurting from her torn hymen. It mixed with her juices, oozing out in thick, sticky waves.
"Haa, haa...!"
My breath caught in my throat. Pity. Guilt. Sorrow. And an overwhelming pleasure that melted my brain. The virgin's endurance hit its limit.
============================
[Seo-ah's POV]
The curse of that demonic magic tool that felt like it would rip my body apart. Hellish heat. Endless orgasms bordering on agony.
"Soooo gooood!! It feels too gooood!! Aaaah!!"
I just shuddered and screamed. I didn't even know what I was doing. Couldn't think of anything. I'd become nothing but a slab of meat gasping in pleasure.
But then.
'Huh...?'
The white flash exploding in my vision cleared. The ringing in my ears faded. In its place slithered an unfamiliar sensation.
Squish. Throb, plunge!
"Ahng...!"
Different from the curse tormenting my skin. A fullness that stretched me to the bursting point. A deep, heavy warmth pressing up from within. Satisfaction as it scraped every inch of my mucosa. And.
Squiiiish. Splurt. Gloop.
Bliss.
"Haa... hng...."
My rolled-back eyes settled. Focus returned. I saw the ceiling. And.
The man panting above me. Jaw clenched, sweat dripping in rivulets. Seojun. My little brother. The one I loved more than anything in the world.
"Aaah…"
A sigh of pure emotion escaped me.

'Seojun's hugging me.'
A fresh wave of pleasure rippled through my core—not forced by the magic tool. Real sex. Real ecstasy. My brother's cock had shredded my virginity. It ravaged my cervix like it meant to shatter it. My brain melted in electric bliss.
An orgasm incomparable to that damned curse.
"Ah! Aaah, huuaaaah...!"
The first aroused cry I'd ever uttered as a woman. My mind went pure white with joy and happiness. The sensations Seojun awakened set every nerve ablaze.
"Seojun-ah…"
The one I loved most in the world was fucking me. It made me so happy. So joyful. My chest swelled until I couldn't breathe.
"Seojun-ah…!!!"
Tears of rapture burst forth. I wailed his name in desperate longing.
But.
'Huh…?'
Too much of a good thing, they say. Spluuurt!Squish!! Plunge!
"Hng, aaah! Aang, go-good, Seojun...! Ah?!"
Crisis. Seojun gripped my hips and twisted the angle. The swollen tip dug under my cervix. The bumpy mucosa. My G-spot.
Ziiiing—!
"Eugeot...!"
In that instant, a foreign sensation shot up my spine. Different from the ache in my walls. Far more tingling, heavier. An intensity that squeezed my bladder like it would devour it.
'No.'
A urge I'd never felt before in my life. Not just needing to pee. My swollen mucosa crushed my bladder from all sides. I felt like I'd burst any second.
"Haa! W-wait, Seojun-ah...! Hngh!"
I thrashed desperately. Pushed at his sweat-slicked chest with both hands.
============================
[Seojun's POV]
Her hands shoving me away as she writhed. I panicked.
"W-what's wrong, sis?"
Did it hurt? Or was it disgust? She had every reason. Fucking her own stepbrother. Startled, I tried to stop my hips.
Squiiiish! Thwoooosh!
"...!!"
Failed. I couldn't stop. Her body wouldn't let me. That impossibly tight masterpiece sucked my shaft like a vacuum, refusing to release. The more I pulled, the fiercer the grip, like it would swallow me to the root.
"P-pull out, please...!"
Seo-ah shook her head wildly. Terror and shame flooded her wine-red eyes.
"I-I'm gonna... gonna pee for real...! I'm seriously gonna pee...!"
Shock. Had I ever seen her like this? Not the gentle girl from our childhood. Not the icy recent version. Not the genius mage looking down from the podium. Not even the bitch shuddering in pleasure.
Just a woman terrified of pissing herself while impaled on her brother. A spine-chilling thrill of taboo conquest. I denied the rush, but heat boiled in my groin.
"Sorry, sis."
I gritted my teeth.
"Sorry. I really can't hold back anymore...!"
Reason snapped. I seized her snow-white hips and crushed them.
"N-no! Seojun-ah...! Get out, I really can't hold— Kyaaaaah!!"
Final sprint. Toward that bumpy spot under her cervix. Her G-spot. The one that terrified her.
Thwack! Thwack! Ziiiip, plunge! Plunge!
"Aaaaah!! I'm cumming—I'm peeing!! I'm really peeeing!!"
Seo-ah's eyes rolled fully white. Veins bulged on her neck. Her whole body shook like a leaf as she choked out screams.
And.
"Sis…!"
My mind went blank. My tip pierced her cervix. Toward the deepest, hottest depths.
Drip. Drip. Spurt-spurt-spuuuurt!!
"I'm cumming…!"
"Haaaaaaaah!!!!"
Everything pent up exploded. Straight into her womb. Decades of desire erupted as thick, heavy semen. Like I'd saved it all for this moment.
Gloop. Gloop.
At the same time.
"Aaaaaah! Huuaaaaaah...!"
Seo-ah's body hit its limit. Her urethra, clenched in shame, gave way weakly.
Pssshhhh—!
"...."
Horror. Between her spread legs. From around our joined shaft.
Pale yellow urine gushed like a fountain. Warm streams trickled down her trembling thighs. A sharp, acrid piss stench mixed with sweet nectar, filling the living room.
Trickle-trickle.
Her body soaked in a rainbow of filth. Virgin blood from her torn hymen. Frothy white juices and nectar. Now topped with yellow piss. And finally, sticky foam leaking from gaps it couldn't fill.
So filthy. So beautiful.
"Haa... haa...."
I collapsed onto her. Gasping ragged breaths.
Seo-ah beneath me. A wretched, twisted sight.

"Hngh... ah... uwaaa...."
Shattered, unfocused eyes. Tears smeared with shame. Drool and foam dangling from parted lips. Covered in her own waste and my cum. She twitched sporadically, sweat pouring.
"S-sis...."
Reality crashed in. What had I done? I meant to save her, but I wrecked her. Guilt surged. I scrambled to pull out, to clean her up, to fix this mess.
But.
Grab.
"Eh...?"
Snow-white arms wrapped tight around my neck.
"N-no…!"
Her cracked, desperate voice. She yanked my back greedily.
"Don't pull out...."
Lips trembling with shame. Despair of a piss-soaked bitch. Yet.
Her walls and arms bound me fiercely.
"Don't pull out yet… Seojun-ah."
She buried her face deep in my neck.
"I... I think I can go again."
Not heat. Not the curse. Just a woman's honest heart.
==============================
[Seojun's POV]
How long had we been tangled like that? 'What the hell have I done….' Bitter guilt filled me again.
"Sis...."
I carefully withdrew my hips. The clinging flesh reluctantly released.
Squiiiish. Chuuup—!
"Ahngh...!"
Seo-ah whimpered in agony, curling up. The moment my shaft fully left her entrance.
Gloop.
Her unclosing pink slit. Thick, milky white gushed out in waves. Decades of sticky desire.
Splat.
It splattered into the puddle of piss and blood.
"Eung… aaah…"
Sis sprawled on the sofa. Tears still welled in her unfocused eyes. Her pale cheeks burned red with shame.
'You crazy bastard.'
I cursed myself. 'Yoon Seojun, you animal? Fucking your own sister?'
I couldn't meet her eyes. I dropped to my knees before the sofa, rubbing my face with trembling hands.
"...You okay, sis?"
My voice shook pathetically.
"I went too hard, didn't I? Sorry. I'm really, really sorry…."
I babbled apologies incoherently. Heavy silence stretched.
"…"
Terror kept my head down. Was she glaring like I was scum? About to slap me?
But the silence shattered with unexpected reproach.
"...Hey."
"Huh? S-sis?"
I jerked my head up. Met her wine-red gaze. She haughtily turned away, feigning nonchalance.

"You suck so bad."
"......Huh?"
"It just hurt. And why'd you cum so fast? You're not premature already at your age, are you?"
Awkward consideration. Forced scolding thick with embarrassment. My choking guilt shattered. Replaced by intense embarrassment and injustice. My lip jutted out unwittingly.
"You've got some nerve."
She flicked away her tears and clicked her tongue.
"Says the one who was shaking her pussy saying it felt good and pissed herself."
"...!"
"And if I was that bad, would you have made that racket? Anyone hearing would've thought we went for hours."
Sibling snark skill. Perfect effect.
"You little shit...!"
Her eyes narrowed sharply. She tried to rise and smack my back.
But.
"Ahk...!"
She crumpled back onto the sofa. Clutching her belly, twisting her waist, knees together.
"Sis, you okay?!"
"Haa, ahng... Your cum in my belly…."
"What?"
"Damn… how much did you shoot?! My stomach's gonna burst…!"
Ridiculous whining. Overflowing semen stimulating her womb?
Squish. Splurt.
"For real… hngh… no wonder premature bastards shoot so muuuch…!"
Lewd moans. Vulgar squelches. Teary nonsense while berating me.
"Who's premature! If anything, the one who pissed is the premature one!"
"Seojun, you…!"
'Phew.'
I sighed in relief, firing back.
Her rambling jabs. I felt it without words. Her way of brushing off my guilt.
'Thank god…'
Truly. She hadn't changed. Past or present.
"Anyway, my sister's all talk."
Still warm, kind. My everything.