My Sister's Proactive Advances

We entered the bathroom together, one right after the other. "Stick your dick out." Squeeze, squeeze. My older sister dispensed some body wash into her palm. When she rubbed her hands together, thick clouds of bubbles foamed up.

"You don't have to rush, you know."

"I'm going to take my time. For as long as I want. You put me through a lot, after all."

"Then you really shouldn't take your time. My dick's gonna start hurting."

Grip. My sister seized the space between my legs.

"If you keep bossing me around, I might just bite it off."

My sister... is being really proactive.

Had she decided not to hide her feelings anymore? Ever since that night she got drunk and threw her tantrum, the emotional distance between us had shrunk dramatically. She wanted to express her affection for her little brother more openly now.

"Stop standing there like an idiot and sit in the tub. It'll be easier to touch you that way."

I sat down as instructed, and she knelt right in front of me.

"Your knees are going to hurt. The bathroom floor is hard."

"It's fine."

"Don't be like that. Here."

I took the towel hanging nearby, folded it neatly, and offered it to her.

"...Thanks."

After thanking me, she grabbed my cock again.

"Hey."

"Yeah?"

"You know, I've been thinking about something."

"About what?"

"Logically speaking, whether this could actually fit inside my body."

The list of ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠things she'd searched suddenly flashed through my mind.

"Uh, yeah..."

"Honestly, you want to put it inside me too, don't you?"

"Well, sure. But if you say no, I won't. Platonic. Purely emotional love."

"Don't lie to me. You wanna die? You told me not to lie to you, remember? Especially when your dick is this hard."

"Yes. If possible, I want to put it in."

Rub, rub. She started stroking me. One hand tormented the head while the other pumped up and down my shaft in steady rhythm.

"But seriously, how would we even do it? I feel like I'd die."

"Sis. You said you've never even put a finger in before, right?"

"Even if I haven't, I told you before."

"Right. That you've only touched the outside."

"Yeah."

"Hold on a second. Stop touching it and come sit next to me."

I rinsed off the bubbles first. It probably wasn't good to leave soap on my dick for too long. I washed her hands too.

"You have sexual desires too. Let's stop avoiding the topic and just talk about it openly now."

"...I do."

"Then why did you only touch the outside? Didn't you ever think about fingering yourself?"

I slowly ran my fingers through her hair like a comb. A single strand that had been stuck to her lip fell away with a soft plop.

"It's scary. What if my hymen tears? That's... something I'm supposed to give to a precious man later."

"Right. You were saving it for me. Good girl."

"Idiot. Who said it was for you?"

"Then whose is it? Doesn't it belong to me? Since you belong to me?"

Chu. Chu. When I didn't get the answer I wanted, I kissed her forehead again and again, almost whining.

"...Fine. You belong to me. Not the other way around. Get the hierarchy straight if you don't want to be punished."

"Yes, yes. Of course, Master. Aigoo, you're so cute. Aigoo, our Yunseo is so cute!"

I couldn't hold back anymore and rubbed my cheek all over hers. How does this woman always know exactly what to say to turn me on?

"Bring that dick back here. I need to suck it."

"Hey now. I don't like it when you do it out of obligation. You did it for me, so I have to do it for you—"

"...I'm doing it because I want to. Hurry up and give it to me."

She knelt between my legs again. Since I'd washed it thoroughly, it should be fine.

"Aigoo, my arms are getting tired. Want me to do it harder?"

"Yeah."

"Like this?"

"Perfect. But sis."

"What?"

"When I put my tongue in you, how did it feel? When I licked you down here."

I pointed between her legs while she paused.

"...It felt good."

"It didn't hurt, right?"

"No."

"Then later, maybe we could try putting a finger in? Just one at first. If ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠it feels okay, we can try adding more."

"What if I bleed?"

"So what if you bleed? I'll be responsible for you for the rest of our lives anyway. What's there to worry about?"

Huh. Was that not the answer she wanted?

Bonk. She punched my forehead with her fist.

"You don't have anything to your name, yet you keep saying you'll take responsibility for me."

"Why not? I even went to the military. I'll definitely take responsibility for you, no matter what it takes."

"You don't have to act so tough. I like you plenty even without those words."

She looked at me and smiled sweetly. It was that devilish smile she always gave me. Maybe the reason I try so hard for this woman is just to see that smile, to earn that expression.

"Anyway, back to the original topic. If you put a finger in me... Hey, by the way, when the hell are you going to cum?"

Her arms seemed to be getting tired. She stopped stroking and patted my shoulder a few times.

"If you keep touching it that half-heartedly, probably around tomorrow morning."

"Half-hearted? I'm working really hard here."

Come on. She was spacing out during the conversation, but now she suddenly starts pumping vigorously. Of course I wasn't going to nitpick. I just found her adorable and felt like teasing her a little.

"Or you could put it between your breasts."

"You real pervert. You've been watching weird stuff again, haven't you?"

"I'm just saying we should try more varied things to develop our sibling relationship. This way and that way."

Her breasts weren't that big, but I thought we could still give it a shot.

"Please? Do it for me? Yeah?"

Prod, prod. I poked her nipples with the head of my cock.

"Mine aren't that big. I don't think I can fit it in properly."

"Then just rub it against them lightly."

"Seriously. You make me do all sorts of things."

Even as she grumbled, she obediently pressed her breasts together, creating a valley, and slid my cock between them.

"Like this? It feels like... it's not really working."

"That's because there's no lube. Spit on it a little."

"Kaaah~"

"Not phlegm."

"I'm kidding. Hold on."

Slurp. She took my cock into her mouth. After licking the head a few times, she pulled it out, letting thick strings of saliva drip down.

"I'll try again."

"Please do."

She was really into it. It seemed I'd sparked her competitive spirit. She worked hard, rubbing her breasts against me for my sake.

"How does this feel? Good?"

"Yeah, it feels good."

Very. Extremely. Immensely. I'd always had this slight fantasy about it, and having my sister do it made me especially happy. But unfortunately, it would probably take a long time to reach climax. The pressure was much weaker than a handjob, so the stimulation felt too mild.

"Haa... This is tiring. I think they're going to bruise. Are you still far from finishing?"

"Sorry. This isn't going to work."

In the end, she lowered her breasts again. After being put through all this by me, she seemed drained. She slumped back down.

"Aigoo. I'm making my sister work so hard."

"It's fine. Should I use my hands again?"

"No. I'll do it myself."

"It's okay. Consider it arm exercise."

"No. You just stay still. If you're really that eager... could you do exactly what I tell you for a bit?"

"Tell me."

"Um, open your mouth."

"You know your whole thing won't fit in my mouth, right?"

"I'm not trying to put it in your mouth, so don't worry."

I stood with my legs slightly spread toward her. When she sat with her thighs spread, our heights matched up so my cock was level with her mouth. Slowly, slowly. I shook my hips while looking at her.

"Say, 'Please give me your cum.'"

"You damn pervert. You're really going to make your sister say weird stuff!"

"Please. In return, I'll do anything you want me to do."

"...Please give me your cum."

"A little more desperately. Stick your tongue out too."

"I'm not a ventriloquist. How am I supposed to talk with my tongue out?"

"Just do it well. Use your imagination. Like you're really desperate and in heat."

"Haa, fine. Just wait until later."

After letting out a big sigh, she readjusted her posture.

"...Please give me your cum. I want to eat Yunseo's cum."

"Does begging your little brother for his cum feel good? You perverted bitch."

As requested, she stuck her tongue out. Droplets of saliva dripped from the tip.

"But... you were the one who made me go into heat first, waving your cock around and making it smell."

Like a cat, she rubbed her cheek against my thigh. While I shook my cock, she planted little kisses on the head.

"Not 'you.' ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠Call me Master. Say Master."

"Fuck, seriously. This is hard to keep up with."

"I'll worship you for the rest of my life. Please."

I always serve you with utmost devotion too, don't I?

"Master's cock smells so good that I became weird too."

She looked up at me seductively again.

"Our Yunseo is so cute when she's honest."

"I want to eat your cock. Can I?"

Before I could even answer, she suddenly took the head into her mouth. She gripped my ass tightly with both hands and wouldn't let go.

You don't have to be this enthusiastic...

I grumbled inwardly, but she obediently—no, almost excessively—played along with her little brother's perverted roleplay.

"Master's cock, hurry, hurry and play with it and give me your cum please."

While she shook her arm vigorously, she helped by continuously licking around the head with her tongue. I could feel the end approaching.

"Sis. You can use your mouth now."

Just like before, she refused to let go of my cock.

"I said you ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠can use your mouth!"

"Little brother's cum is supposed to be received in big sister's mouth. Hurry up and give it to me."

Slurp. She pulled her mouth away just to speak, then swallowed me again. She slapped the back of my hand that was holding my cock, took over, and started pumping it furiously.

"Haa, slurp, mmm. Lick, lick."

"Sis. You don't have to go this— haa. Hngh. far— ah!"

Paying no attention to her little brother's moans, she continued savoring me. She really was like a devil. A beautiful devil devouring me whole.