What the Fuck Did I Teach You?
What the fuck is this? Is this what I taught you? That my dick is dirty if you touch it every day, but you can touch your own cunt whenever you want? This isn't even role reversal anymore. She has no concept of a conscience at all. I hadn't pulled her panties down yet, but the disappointment was already hitting me.
“W-well, to be exact, it's when a slightly dirty scene comes up. I imagine that situation and twist my legs together. Squeeze my thighs tight.”
When I stared at her with a dumbfounded look, my sister quickly added an explanation.
“Like when the siblings kiss each other. Or when the little brother is tormenting his big sister.”
“...I see.”
If that's what you say, then that's what it is.
“You told me to be fucking honest!”
“Why? I'm listening, aren't I? Who said anything?”
“You're looking at me with that shitty expression. Makes me want to gouge your eyes out.”
“What the—? After everything else, now you're picking a fight over my facial expression? Fine. You said you jerk off every time you write, so I figured that cunt of yours must be wrecked by now. Happy?”
“Why the hell are you saying that shit out loud, you idiot? Just think it! Think it!”
“You were the one who asked! You said why was I looking at you like that!”
“...It's not to that extent. Do you think I'm always horny like you?”
Honestly, when it comes to pure perversion, my sister is way worse than me. If I said that she'd just get mad again.
“What do you do when you're doing it?”
“...Do I really have to tell you that too? Stop asking so much. I only agreed to show you, remember?”
Little by little, I moved closer to her. She backed away until she hit the wall, and I looked down at her intently.
“I... I'm really embarrassed, okay?”
“Even though your beloved little brother is asking?”
“...Yeah.”
“You're not using some ridiculously sized dildo or anything, right?”
“No, you idiot.”
“You know, something bigger than my dick. The kind where you're not even sure it can fit inside a human body.”
“I said no, you idiot! No!”
“Since you won't tell me, I have no choice but to imagine it myself. Hmm, if it's bigger than my dick, I honestly don't have much confidence. Maybe I should go to the urologist and get a shot?”
“You fucking bastard, seriously... I rub the outside.”
“How?”
“With the tip of my middle finger, lightly. Like this. Spread it with my index and ring fingers and just barely touch the outside.”
“Like this?”
“Idiot, where are you touching?! I'm going to kill you!”
“I was just gesturing over your clothes. I didn't even touch your pussy.”
“You call this not touching? If they took your fingerprints and it matched, they could cut your hands off, you know?”
“...Did I actually touch it? I've been exercising so much that my fingertips feel numb. I couldn't really tell.”
“If I had my panties off, you'd have rubbed it enough to fit a whole finger in before spouting that bullshit? I'm really going to kill you. You tell me not to lie, but here you are.”
“Aww, it's not that bad. Okay, I barely grazed it. I admit it! Pussy explosion. I confess!”
“You fucker.”
“W-wait, sis.”
“What? Why? Keep talking.”
“I-I'm sorry. Please forgive me. No matter how angry you are, grabbing your brother's balls is a bit much.”
I'd let my guard down. Her fingers were gently stroking, but the moment she put strength into her grip, just imagining what would happen was terrifying.
“Hey, perfect timing. Let's become sisters then. I'm happy to have a little sister now. No more worrying about getting raped.”
“At least let me dock with your pussy once before you do that. Ah, ah, ah. Wait. I'll behave. Let go, please.”
She squeezed hard. The meaning was clearly a threat as she gripped the shaft of my cock tightly. Goosebumps spread all over me. If she grabbed my balls with that much force...
Somebody save me.
“Treat me well. If you keep acting out, we'll be sisters starting today.”
“Haa, haa. Balls, don't worry. The mean big sister has been kicked out by Master. What? You want me to fuck her hard and punish her? Wait, sis. Hey! Fuck, why are you trying to kick my balls?”
“I blocked it anyway. It's fine.”
“Then if I wear a condom and fuck you, that prevents pregnancy so it's okay, right? Fuck, I'm going to the convenience store right now and buying every single one they have.”
“Go ahead. After I cut your dick off, the two of us as brother and sister—no, as sisters—can blow up balloons and play. That'd be fun.”
“Sob sob. Balls, don't cry. I'll drink cold water for you later.”
“You fucking idiot. Just because you were born with a big dick you act all high and mighty.”
That's all it takes. You were the one messing with me because my dick is big. Rubbing your thighs together and everything.
“Sis.”
“What, you bastard! If you pull any more shit I'm seriously going to get the scissors!”
“Stop swearing. It's time to wash up now.”
“......”
“Or should I wash you? I'm confident I can clean you up nicely.”
“...Stop talking shit and stay still.”
“Aww, don't be shy. Come on, let's take your pants off first.”
“Hey! Hey!”
I ignored my sister's angry protests and grabbed her waistband, yanking it down. Today she wasn't wearing her usual gray ones but black panties. Maybe she'd realized the wet spots showed too obviously and decided to stop wearing the gray ones. But...
These show it plenty too.
The stain was one thing, but what really mattered was how the crotch area was deeply indented inward.
“That's enough, stop looking!”
She quickly covered my eyes with her hand.
Axe mark. Pussy mark. Pink mark. The mark from touching herself while writing erotica.
This wasn't good. It was already too late.
“Sorry, sis. Just a second.”
“What the fuck are you doing? Why is your hand going there!”
“If this keeps up I'm really going to jump you.”
I had no choice but to grab my cock.
“If I don't jerk off right now, something bad is going to happen. Just a moment.”
Slap. Slap. Slap. Slap.
I glared at my sister like I wanted to devour her as she stood there in just her panties, hunched over awkwardly in front of her little brother.
“Haa, haa... fuck... seriously...”
She fidgeted restlessly, leaning against the wall.
“Hey, stop covering your pussy! Move your hand off your panties.”
“Why the hell are you yelling?”
“Sorry, sis. I just... I need to keep looking. If I startled you, I'm really sorry.”
“Haa, this... this is completely insane.”
“Hey, did you already forget? You asked to see me jerk off too, remember?”
My sister's panties. My sister's pussy.
“That was different, you bastard. At least I was fully dressed down there.”
“I don't care. Hey. Let's just pull your panties down a little.”
“Shut the fuck up. Absolutely not.”
“You're going to show me your pussy anyway. Please. I'm seriously begging you like this.”
“This is how you beg? While jerking your dick.”
“I'll do twice as much for you. No, ten times more. Please, really.”
Even I knew it was bullshit. One hand gripping my cock, the other kneading my sister's breasts.
Fuck. I needed to say something that actually made sense.
“Please pull your panties down just a little. Just one minute.”
“Fuck, why did it suddenly get longer? You said ten seconds before.”
“We never negotiated that. And wasn't it originally ten minutes? Including the time to cum.”
“Don't keep hounding me about my pussy.”
“We agreed you'd show me.”
“I'll show you after I shower.”
“That's too late. I'm going to die from blue balls. Since you're going to show me anyway, let's change the order.”
I stopped jerking off and dove between her legs.
“You b-bastard, fuck! Haa, haa. You crazy bastard! Haa, haau...”
I pressed my lips to the inside of her thigh. I licked wildly as my head slowly moved upward.
“S-stop it. Ha! Haa. N-no. Please. Haaang!”
Then suddenly I turned my face and licked mercilessly over her panties. The fabric blocked my tongue from going further, but the light, teasing licks were enough to give her crotch plenty of stimulation.
“Mom, haa, it's weird. Mom. Save me. Haat. Please. Huu, I-I can't stand anymore.”
Her reaction was on a completely different level from when I played with her breasts. She twisted her waist this way and that before finally collapsing to the floor.
“Hic. Hiccup. Haa. Hoo. Hic. You bastard, I told you to stop. Fuck!”
She was swearing and throwing a fit, but I couldn't feel any real anger in it. The scent she used to secretly spray next to me when we slept together as siblings was filling the entire bathroom.
“If you'd just done what I told you, it would've been fine. Why do you keep teasing me until I'm about to explode?”
“Hic, hiccup, hiccup. You evil bastard. You fucking piece of shit.”
“Aww, was it that good? Good enough to make you cry like that?”
“Don't touch me. You fucking bastard. I'm really going to kill you.”
“No matter how angry you get, it's not scary at all.”
I placed my hand on her waistband again.
“Kang Yunseo. I told you not to lie, didn't I?”
“...Ha, aht.”
I rubbed between her legs, and sticky wetness coated my fingertips.
“With your pussy this wet, you're telling me no and calling me a bastard.”
“Hic. Haa! Haa. Huu.”
I kept rubbing, scratching at the deeply indented part of her crotch.
“Then what are you, getting this wet? Are you a bitch in heat offering her cunt to a dog?”
“Huu, huu. Haa. Haa.”
“Sis. You need to answer me.”
“Haa, haa, haa...”
“If you keep your mouth shut, I'll take that as permission and pull them down, okay?”
“Haa, haa. W-wait.”
“Why?”
If she acted stubborn in this situation, I'd rip her panties off completely.
“I-I'll take them off. I'll do it, okay?”
“You should've done that from the start. Why make me angry?”
“...You bastard.”
“This bastard is going to start jerking off again, so you keep showing your pussy, okay? Good girl, hurry up?”
I grabbed my cock again.
“Haa. Haa. Fuck, I feel like a total whore.”
“A whore shows it to everyone. But you're only going to show yours to me for the rest of your life, so it's completely different.”
“You fucker. Whatever.”
Staggering, my sister got up from the floor. I adjusted my posture to eye level so I could see better.
“Haa. Haa.”
She placed her hands on her panties.
“Fuck. Haa. Haa.”
Then, very slowly, very slowly, she began lowering her underwear.
“...There. Look, you bastard. Go ahead and look all you want, fuck. Haa. However you want. Haa. Haa...”
Little by little, my sister's perfect naked body began to reveal itself. That place that should never be shown to anyone except the person she had allowed to have her body.