Sister's Pussy Can't Live Without Bro's Cum
"What can I do? Sis's pussy has become a body that can't live without your semen anymore."
[Seo-ah's Perspective]
'Huh?'
I'd been clutching my belly, panting hard. Then it hit me—something was off. It was strangely peaceful.
"Haa... huu..."
I took a deep breath. My chest rose and fell dramatically. Normally, that sensation alone would have sent me over the edge. But nothing. I raised my hand and trailed it along my thigh. The texture of my skin prickled under my fingers. That was it. Of course, deep inside, there was still a faint heat and itch. The curse from the Magic Tool hadn't vanished completely. But that was fine. Just moments ago, even the brush of fabric had made me squirt uncontrollably. My pussy had been foaming endlessly. The hellish pleasure melting my brain had gone eerily quiet.
Impossible.
What was going on? I shoved my shame aside and summoned my reason, recalling the principles of the Magic Tool.
'Mirror of Truth.'
The curse's essence was the physical manifestation of suppressed affection. It twisted my love for my little brother into raw heat, exposing it all. But right now... below my navel... deep inside... my womb. It felt heavy. Seojun's extension piercing right through me. Our little brother's body heat. The hot fruit of love he'd poured into me to save me. Semen.
Ah.
It clicked. The Magic Tool had no intelligence. It was just a cluster of magic formulas. With Seojun's semen filling my womb, it had glitched briefly.
[Love achieved.]
[Fruit borne, no need for further heat.]
A temporary fix. As long as I held his semen inside, I was free from the heat. Until it absorbed or leaked out. At least for now, normal life was possible.
I can wear clothes properly.
Walk without issue.
No more drooling in front of students.
Joy surged through me. But the relief soon spiraled in a wild direction.
Wait.
What if... just what if...
I got pregnant?
Beyond just holding fluids. If I actually conceived the embodiment of our love? Wouldn't the curse vanish forever?
My delusions exploded uncontrollably. A cute kid who looked just like me and Seojun. A baby with my silver hair and his eyes. Me breastfeeding while he hugged me from behind. The three of us holding hands on a weekend park stroll. A hundred years together. Pure love fulfilled.
Aah... yes... so happy...
The corners of my mouth twitched upward on their own. The warmth of my brother's seed filling my womb felt utterly lovable.
"Uhu... uhuhuhu..."
I let out a creepy laugh. Drool dripping down my chin. Then...
A terrifying fact slammed into my brain.
[Half-elf and human pregnancy rates are extremely low.]
Ah.
Like mules or ligers. Hybrids struggle to produce offspring. Same for half-elves. The odds of me conceiving were near-miraculous. And then... 'Lifespan Sharing Magic.' A spell sharing lifespans between partners. Only activatable with offspring.
No baby?
No lifespan sharing.
Seojun was human. He'd go gray before me. Wrinkle. Age and fall ill. I'd hold his dying body in my arms. Left alone. Endless solitude.
No.
My heart tore apart. My lower belly still warm with his trace, but my mind plunged into icy depths. My smiling lips quivered. My eyes burned hot. I bit my lip hard, but the swelling sadness overflowed.
"Hic... hng..."
Tears streamed down my cheeks in drops.
========================
[Seojun's Perspective]
"......?"
I stared up at her blankly. Thought she'd finally lost it. Staring into space, drooling like a perv and cackling. Then her face went pale in an instant. Tears pouring like the world had ended.
Did she hit her head rolling around with me? Fear gripped me.
"S-Sis?"
I rushed over. "W-What're you thinking...? What's with that face? Hurt somewhere again?!"
"......!"
Seo-ah flinched, shoulders shaking. She roughly wiped her tears with the back of her hand. Forced her deathly gloomy expression under control.
"N-No! It's nothing!"
Her flustered reply was super suspicious. She coughed repeatedly to dodge questions.
"Ahem! S-Seojun."
Voice thick with tears. But her tone was back to calm big sis.
"I just figured out something huge."
"Huge?"
"Yeah."
Seo-ah puffed up proudly. Though her wrecked lower half killed any dignity.
"I found the curse's weakness."
"What? For real?!"
My eyes lit up. A solution!
"Yeah. Simple."
Seo-ah gently stroked her lower belly. Right over her womb.
"Your semen."
"......Huh?"
"The load you blasted inside me."
My face burned. Not words for siblings. Even in this mess, it didn't sit right.
"W-What about it."
"When I hold your semen, the Magic Tool glitches."
A weird heat gleamed in Seo-ah's eyes.
"Thinks its goal's met, so it pauses the curse while it's full. Got it?"
I blinked. So...
"Take your load... and I can live normally?"
"Exactly."
Sis smirked, smug as hell. But that meant... for normal days, we'd have to... every day. Whenever. Stuff my semen into her womb. Fuck to survive.
"Ha..."
I swallowed dryly.
"So from now on, keep going...?"
"No choice."
Sis shrugged dramatically. But her thighs twisted, squelching wetly. Like she was anticipating it.
"What can I do when sis's pussy can't live without your semen anymore."
"Tone it down..."
"It's the truth."
Impossible to get used to.
"So, Seojun."
Seo-ah crawled toward me on her knees, hips wiggling. Knees and thighs smeared passing the sticky puddle. Didn't care. Her wine-red eyes close up, swirling with hot lust again.
"From now on, before work. No, whenever."
"......"
"Blast a ton into my pussy. Got it?"
"......"
I scratched my head, nodding silently. Her pretty lips curled slyly. Pale hand groped my inner thigh as she whispered.
"And Seojun."
"W-What now."
"One more time."
"What? We just finished!"
"Think one load's enough? First time, gotta fill it overflowing."
Seo-ah smacked her lips playfully.
"Do it again. Right now."
"Sis...!"
"Hurry. My little bro. Come fill sis's hole to the brim. Yeah?"
Rubbing her cheek against me, clinging. I had no choice but to lay her down again.
===================================
[Seojun's Perspective]
"Haa... haa..."
Three loads done. I dragged my exhausted body up. Moments later, panting, I glanced over.
Sofa corner. Woman sprawled, legs splayed wide. My stepsis. Yoon Seo-ah.
Plop.Squelchhh...Drip drip.
Between her legs. The ugly gape wouldn't close. Remnants of desire shoved deep inside. Overflowing semen bulged and poured out endlessly.
"Uhu... huaa..."
Seo-ah panted with half-lidded eyes, tongue lolling. Unfocused wine-red gaze wandered blankly. Sticky drool trailed from her mouth. A beast overfed on her brother's cock. Hard to believe she was a virgin minutes ago. Straight-up slut possessed by lust.
Squelch, squish.
Subconsciously, she fiddled between her legs. Semen and juices mixed, dripping down her labia. She swirled the sticky puddle with her fingers, giggling.
"Uhuhu... Seojun's stuff... filled me up so tighttt..."
Tongue slurred, sweet nasal whine.
"Warm... womb stuffed full... nghhh... can't let any leak outtt..."
Gesturing to scoop back the spilling semen. Fingers plugging her red mucosa desperately.
"......"
I finally spoke carefully.
"Sis..."
"Eek?!"
She jolted, head snapping up. Her dazed focus locked on me.
"N-Not touching my pussy...! U-Uh! This is just...!"
Yanked her fingers out, making excuses. The long string from her tips mocked her.
I cleared my throat, sighing.
"W-Wanna wash up first?"
"U-Uh. Yeah, gotta wash..."
Shame hit late. She ducked her head, avoiding my eyes. Gripped the sofa arm, struggling up.
Tremble. Shake shake!
"Ow!"
She collapsed trying to stand. Hips totally limp. I rushed, scooping her waist. Princess carry. First time since kids.
Light.
Her delicate, slender frame anew. But massive tits pressing my chest. Full hips filling my arms.
Arms around my neck, face buried. Her pale ear flushed crimson.
"D-Don't look too much..."
"......"
"I-I smell like piss, f-for real..."
Mosquito voice. Whining helplessly. Adorably ridiculous. My chest itched warmly.
"I've seen it all already."
"Yaa...!"
Carried her sulking ass to the bathroom.
=======================
Shhhhaaa—!
Warm water streamed. White steam rose. Sis slumped on the tub edge. I silently washed the stains from her pale body. Bloody fluids swirled down the drain.
"Not too hot...?"
"Nah."
Lazy nasal hum. Totally relaxed. Toes wiggling pleasurably now and then.
But.
"Hey."
"What."
"Clean your inner thighs properly. Still sticky."
Back to bossy sis. Sharp glare. Naggy tone. Classic.
"How much did you even cum? So gross."
Ridiculous.
"You begged for one more, now this."
"When did I?!"
"Gonna wake the neighbors. Just stay still."
Lathered sponge with body wash. Gently scrubbed from thighs to shins. Grimy skin bloomed white again.
The worst spot. Between her legs.
Splaaay.
"Spread 'em."
She hesitated, then parted obediently.
Smooch. Squelch.
Red mucosa not settled. Swollen entrance puffing, breathing. Blood, juices, my semen caked around.
Aimed showerhead, fingers approaching—
"Nghh, w-wait there!"
Desperate yelp. Grabbed my wrist tight.
"Why."
"Just the outside gently!!"
"It's bloody. Gotta clean and disinfect. Ointment too. Don't wanna get sick."
Obvious. But she freaked, shaking her head. Pointy ears flapping.
"You psycho!!"
"......?!"
"Wash inside and your semen all flows out!!"
Her lion roar echoed.
"What then! Wanna see me foam and drool in fits again?!"
Face beet red. Insisting on cradling bro's load in her pussy. Speechless.
"......Sis."
"What!"
"Your wording's too blunt lately."
"Yoon Seojun! It's my life on the line. Vulgar my ass?!"
Squelch. Smoosh.
She cupped her swollen labia with her hand. Plugging tight to stop leaks.
"No way. This is my lifeline. Not losing a drop."
I threw up my hands.
"Fine, fine! Just the outside lightly."
No winning. Carefully wiped blood from her labia. Even then, terrified water might enter, she twisted her thighs in panic.