Reunion with My Sister
My head felt like it had suddenly short-circuited.
“Hah… hah…!”
I clamped my own hand over my mouth and somehow managed to stifle the scream, but the shock of what was in front of me made the room spin.
That… was that… really a dick?!
No way…
How could something that huge even fit inside a person?
Unconsciously, I reached out and pressed my palm against the enormous length that jutted out from my big brother’s lower belly. One palm… two palms… three? The tip brushed past my navel and almost reached my sternum.
*This is impossible… How does this even fit inside…*
Was I supposed to die from being stabbed?
Oh… what the hell am I even doing right now!
*No, no— I just got curious all of a sudden!*
Thump. Thump.
My intuition had turned my big brother’s groin pitch-black with shock.
Just seeing that absurdly massive cock was enough to make my heart feel like it would burst, but things weren’t about to stop there.
“Y-yes… you’re… cumming inside… right, senpai…? R-right?”
It was my little sister’s voice—Hajuka’s voice, the one I’d never heard in all our time together. Anxious. Excited. Drooling.
What the—?!
Cumming?
*What is she trying to do, Hajuka? She’s about to do something bad while our big brother is asleep?*
I’d been wrong—Hajuka had actually grabbed his cock with her hand.
Big brother’s wasn’t cold at all. Hajuka suffered from poor circulation; her hands should have been freezing. And when she got nervous her palms sweated, which would have made them even colder.
“Ugh… S-senpai… it’s so warm…”
My worries were completely misplaced. Big brother’s thing had grown even harder in her hand, throbbing proudly under her touch. She stroked it up and down with gentle, careful movements.
At first she looked a little clumsy, but after repeating the motion many times she had clearly found the most efficient way to extract male seed.
Swoosh♡ Swoosh♡ Swoosh♡
“N-no… please… senpai… this feels weird…”
What did it feel like? Holding and caressing something that huge—how was I supposed to even describe it?
I knew the instinctive fear a woman felt for something so massive was real, but watching her little body bob up and down on the thick shaft also made me think… it was kind of cute.
*Ugh… this is what adults do when they grow up…*
I was slightly annoyed. She was only taller than me; she shouldn’t have been acting so childishly compared to my younger sister.
Then Hajuka let out a startled sound.
“Eh…?”
I looked closer. Big brother’s tip had swollen alarmingly, shiny and pulsing. The slit at the end twitched and leaked transparent fluid in a steady stream.
It was about to burst any second.
*C-cumming? Now the seed is shooting out…*
“What do I do… Where should I take it…!”
Hajuka had never had male experience, but the instinct told her he was about to unload.
That moment—
Gush—
The seed erupted from the thick cock, splattering everywhere. But judging by its size and the sheer power behind it, it wasn’t going to stop there. Hajuka seemed to realize it too.
“Hiyak!? Uhh!! Uuuup!”
Right before the explosion painted the room, Hajuka made a decision no one could have predicted: she opened her mouth and took his cock inside.
“Hah—?!”
Gurgle♡
Seed flooded her mouth, filling it to the brim. Her cheeks puffed out instantly, ballooning.
What was inside her?
The girl who had smiled so brightly at me just moments ago… now her mouth was stuffed full of my big brother’s—
It felt weird.
*Really. It really is weird.*
I was turned on and disgusted at the same time… weird!
“Uuu…♡ Hup…♡”
Swoosh♡ Swoosh♡
Gurgle♡ Gurgle♡ Gurgle♡ Gurgle♡—
Hajuka swallowed every drop while still stroking his cock with her free hand—complimenting him like she’d done well, praising him for cumming so earnestly, begging him to keep going until it felt good.
“Ugh…”
Could I have done that? If it had been me, I would have fainted the second I saw that monster cock.
It really was weird.
Knowing I was worse than Hajuka made me feel a little prideful as a woman, but hiding in the closet and secretly watching my big brother’s indecent act was somehow… strangely erotic.
Without realizing it, my fingers had slipped between my thighs hours ago.
Squish♡
My panties were soaked from how wet I’d gotten.
“Haaan…♡— Hup?!”
The moment my fingers brushed against my slit I couldn’t hold back a moan that came out of me like a scream.
Ahh!
“Uuuuah!!”
Hajuka stared at me from inside the closet with eyes I had never seen before in my life—fierce, terrifying.
*W-what do I do! Wh-what now!?*
She was the sister I’d always wanted. The one who never stopped smiling when we were together. But I hadn’t wanted a reunion like this.
What the hell do I even say now?
The sister who was jerking off while spying on her big brother having sex in the closet.
She’d be hated.
No doubt they’d call her disgusting.
I wanted to hide in a mouse hole, but reality had no such luxury.
Hajuka slowly walked forward until she stood right in front of the closet.
“Uwaaaaah!”
Her cheeks were still puffed out from the cum in her mouth as she glared at me with beady eyes. It was actually kind of funny, but the situation was far from good.
“Aaaat!”
…She was yelling at me to come out.
Uuuuu…
At least I had to get out on my own two feet.
* * *
Swoosh♡ Swoosh♡
At first I felt guilty, but the longer I touched it the more curious I became, and strangely… it felt good. Most of all, I was getting turned on.
Even though she was unconscious, it felt like my own hand was the one making her feel pleasure. After living my whole life working desperately to take care of the only sister I had, I’d never even held a man’s hand before, yet senpai’s cock was steadily hardening in my grip.
And that felt incredibly satisfying as a woman.
So instead of the businesslike attitude I’d started with, my mind was now foggy as I focused on stroking senpai’s massive manhood. I hadn’t even noticed he was about to cum!
Gurgle— Gurgle—♡
Thick ropes of seed pulsed against his balls and down his urethra. The viscosity was so high it looked almost like jelly as it spurted out over my palm.
Gush!
The seed that finally erupted from the tip while I was still in shock. Even though he was about to cum, there was no towel or container waiting for it.
“What do I do… Where should I take it…!”
Gurgle♡ Gurgle♡ Gurgle♡
More seed was about to explode from senpai’s cock again.
“Hiyak!? Uhh!! Uuuup!”
*W-what the hell did I just do?*
I didn’t know.
It had just happened instinctively.
Given how close it was, if I let senpai finish like this the entire room would be flooded with seed.
And I’d never cleaned up this liquid before, so wiping it all up would take forever. And if senpai woke up in the middle of that…
I didn’t even want to imagine it.
Of course, I’d started with good intentions—making sure senpai’s body didn’t rot from the exposure. But halfway through I’d gotten so absorbed I didn’t even notice.
If he ever asked, “What did you do to my body while I was asleep?” I would never be able to answer honestly.
So I had to avoid situations where he’d ask questions.
“Uuu…♡ Hup…♡”
Gurgle♡ Gurgle♡ Gurgle♡ Gurgle♡
Senpai’s load was enormous.
It kept coming like he wasn’t even a normal man.
It was so abundant it felt like he was trying to show off just how capable he was at fertilizing.
*If I take all this into my womb… I’m definitely going to get pregnant…*
The feeling was so intense my tailbone tingled with pleasure. I was the only woman in the world who had never had sex with anyone else, yet this cock was getting so hard because of my touch.
Somehow, as a woman, I felt incredibly confident. Senpai’s cock felt strangely familiar now.
Swoosh♡ Swoosh♡
“Hup…♡ Zzz…♡”
*Come on… senpai! Take it all! I’ll take every drop!*
Hehe.
This was my first time, but I was doing it pretty well, right?
Right then, a strange sound came from inside the closet.
“Haaan…♡— Hup?!”
A chill ran down my spine.
What… what was that?
A ghost?
Well, if it was a ghost, that was actually good.
Was there a person in senpai’s room? The room of the surveillance agent?
This had to be… an enemy!
Squish♡
I pressed my lips tightly around the tip to stop any more seed from leaking out, then pulled away.
“Uuuuah!”
Oh no.
The voice that came out of me sounded completely stupid because I still had cum in my mouth.
But right now, it was too dangerous to turn my head and spit it out. I needed to find out who the mystery intruder was first.
Senpai was still unconscious.
I’d been hit by Yohee before, but that had only happened because I’d let her strike first. My real strength wasn’t that weak.
*Senpai must be protected.*
Just as my tense fingers reached for the closet door… it swung open by itself.
Creak—
And out stepped a small, familiar figure.
Same soft lavender hair as me.
Big, sparkling eyes.
Cheeks so cute they looked like they’d burst.
Short stature.
*W-what?!*
Why was my sister here?
Gulp!
Ah…
I’d swallowed it.
---
【Secret Observation Mode Activated】