Sexual Frustration
"...You didn't do it with someone else, did you?"
"......."
Logically speaking, no one masturbates at the office. Of course, there might be some crazy bastards who do, but at least I wasn't one of them. So, Chaeyu must have assumed I was with someone else. And she was right.
"...Oppa."
As I stood there, unable to say a word and staring at the floor, Chaeyu called out to me. Her angry expression shifted into one of hurt.
"Are you still seeing that person?"
"......."
The other person I was seeing, whom Chaeyu didn't know about. It seemed she still didn't realize it was Mom. I confirmed it with my silence, and she continued.
"I don't mind you seeing them...? We aren't even dating, after all."
"......."
"But... I wish you'd stop using that app."
"Yeah."
I had already deleted the dating app and deactivated my account long ago. That was only possible because the other party was Mom. I had intended to bury it as a mistake from a time when I was lost. But then, two people appeared at the same time. And they both tempted me.
"You know what I mean, right?"
"I'm sorry."
"...No. Why are you sorry? I'm just jealous, that's all."
Instead of offering a lie-filled excuse, I hugged Chaeyu. It was already too late to lie and say I’d done it alone. It was better to ask for forgiveness than permission.
"Oh. It’s wilted."
"Well, obviously..."
My penis had gone soft. It was natural given the mood, but I felt embarrassed for no reason.
"Should I make it stand up again?"
"What...?"
Chaeyu’s lips touched my smelly cock. A thought I shouldn't have—that this felt like an indirect kiss with Mom—flashed through my mind, so I shook my head to banish it.
"*Mwah. Mwah.*"
Chaeyu kissed—no, pecked—my cock as if it were cute. Embarrassingly, even though it wasn't lewd, my cock began to harden again.
"*Umm... Hup...*"
"......."
Once my cock rested against the tip of her nose, she took it straight into her mouth. Perhaps she had grown accustomed to the scent, as she no longer made a disgusted face.
"*Haa...*"
My cooled cock warmed up again from Chaeyu’s breath. As the movement of her head quickened, a chill ran down my spine, and a moan escaped my lips before I could stop it.
"*Slurp... Shhh-lurp...*"
The sound of saliva pooling and the wet noises were delicious. It felt as if she were intentionally moving faster, as if to wash away any other scent.
"*Ugh...!*"
I pressed down lightly on the top of Chaeyu’s head. Our eyes met, her expression slightly pained. But she didn't stop; instead, she rolled her tongue to pleasure my cock even more.
"*Slurp... Shhh-lurp...*"
I found myself grabbing her hair, guiding her movements as I pleased. As my cock swelled, Chaeyu pushed me away, and it slipped out.
"*Haa...*"
"Were you suffocating?"
"I can't take it anymore."
Chaeyu stripped off her pants and underwear at the same time. I could smell the rich, heavy scent accumulated from the day's events and stress.
"What are we going to do if Dad or Mom comes home..."
"You pick me up and move me, Oppa."
"Are you crazy..."
Perhaps intoxicated by that thick scent, I only said that, but I didn't actually resist. Chaeyu naturally pulled a condom from her bag. It was the brand I always used.
"Where did you get that?"
"...From your room, Oppa."
"Why do you carry that around..."
"You might pounce on me outside, Oppa."
"I am not... that kind of pervert."
Doing it in the living room, not knowing when our parents might return, was already perverted enough. And the fact that my partner was my younger sister? That said it all.
"*Ugh...*"
Chaeyu skillfully put the condom on my cock and climbed on top. I held her to help her slide in. Slowly, from the tip of the glans, I penetrated her.
"Have you been that pent up...?"
"I haven't been able to... for days..."
"You could have just done it yourself..."
"I can't... by myself. You’re the one who made me like this in the first place, Oppa."
"......."
It was too late to say, "When did I?" I had already satisfied many fantasies through Chaeyu. At least Mom didn't do cosplay or master-servant roleplay. If anything, she just enjoyed the feeling of being taken.
"You’re the one who made it so I can't... come... unless it’s you, Oppa..."
"I'm sorry..."
Chaeyu rocked her hips violently. My cock swayed back and forth, stabbing every corner of her insides. Since she was only wearing a top, her buttocks looked even more prominent.
"*Ugh, haa... Ah—hyeat?!*"
Chaeyu turned around in surprise. My hand had landed on her flushed buttocks.
"Y-you scared me!"
"That’s why you’re tightening up even more."
"Seriously..."
I lifted the sweatshirt Chaeyu was wearing and pushed up the cups of her bra. Because she kept moving, I couldn't see her breasts, but it was enough to enjoy their softness.
"My chest... it feels tight..."
"Should I undo the hook?"
"Mmh..."
As I unhooked it, Chaeyu let out a sigh of relief. It was much easier for me to knead them now.
"Does it feel good?"
"Yeah... it feels good..."
I squeezed her soft buttocks and spread them apart. Chaeyu rocked her hips, enjoying the sensation of slipping out of my grasp. Perhaps because the house was free, the loud moans echoing in the living room didn't bother me at all.
"*Ugh, haa, haa...*"
*Beep- beep- beep- beep-*
"...!"
The sound of the door lock suddenly opening.
"*Ugh?!*"
I hurriedly lifted her by the waist. And as Chaeyu requested, I ran into the room with her still impaled on me.
"*Eek?!*"
"Be quiet..."
I laid Chaeyu down on the bed, her legs still wrapped tightly around me. Maybe it was the tension, but she tightened even more.
"Ugh... I'm tired."
Listening to the voice, it was thankfully Dad. If it had been Mom, she would have found us immediately.
"Hey... you have to pull out."
I tried to pull out quickly, but Chaeyu wouldn't let go, her legs locked around me. She tightened even more, as if telling me not to look or leave.
"Are you going to end it like this...?"
"Of course I don't want to. But still..."
"If it ends like this... I might pounce on you tonight, Oppa."
"...You’re quite the intense one, too."
"You’re the one who made me this way, Oppa."
"......."
Who on earth did we inherit this high sex drive from? Both of us.
"Can you be quiet?"
"I'll... try..."
I moved my hips little by little, feeling her pussy again. Chaeyu did her best to suppress her moans, clutching her bedsheets as if tearing them apart.
"*Hngh...!*"
"...!"
It was impossible. Chaeyu's sounds were too loud. Shouldn't she be used to it by now? ...Maybe it reset because it had been a while.
"*Mmph...!*"
Unlike my brain, which told me to stop, my hips kept moving. My cock, not wanting to stop either, continued to stab into Chaeyu.
"I think I'm about to come..."
"I, I want to move..."
"......."
She spun her body around, and Chaeyu climbed on top of me. Perhaps because I was lying down, it seemed much more comfortable for her to move.
"It's, hot..."
"......."
Chaeyu threw her clothes off, not caring that it was her own room. There was no turning back if we got caught now. But because my brain was dominated by pleasure, I didn't stop her.
"Wait, too fast...!"
"Ugh, ha—ugh?!"
I rolled up her panties and stuffed them into Chaeyu’s mouth. The sound became muffled and significantly quieter.
"*Umm, hu, huuuung...!*"
"...!"
With the panties bitten between her teeth, Chaeyu rocked faster. Eventually, my control snapped, and my semen poured out in a rush. Blood rushed to my head, and I felt a chill run through me.
"*Haa... haa...*"
"*Mmm...*"
Why are you looking at me with such a resentful expression? You should have held it in better. A pouting Chaeyu spat the panties onto my face. They smelled intensely.
"You're mean."
"I'm sorry..."
When I took off the condom, the smell was incredible. Chaeyu's room was finally being dyed with my scent. I felt a sense of pride, as if I had expanded my territory.
"*Slurp...*"
"......."
Just like Mom, Chaeyu gave me a cleaning blowjob as if it were the most natural thing in the world. She took every drop of the spilled semen into her mouth, cleaning every corner.
"What do I do..."
"About what?"
"This."
The problem was how to dispose of this condom. The very fact that this existed in my room, or anywhere, was a significant issue.
"Give it here."
"......."
When I handed it to Chaeyu, she immediately turned around and swallowed it. Then, she neatly folded the object that had been going in and out of her pussy just moments ago and wrapped it in tissue.
"*Blegh...*"
"Don't show me... I feel like I'll have strange thoughts."
"You can, though."
"......."
"I can just throw it away when I go out later."
"I have to go out now—"
"Junsu-ya—"
"...?!"
Dad’s voice suddenly called out to me. I hurriedly got dressed and left Chaeyu’s room. Thankfully, the smell hadn't permeated the living room.
"Why?"
"What is it? Where did you come from?"
"I was in Chaeyu’s room."
"Why in your sister’s room?"
"There was something she needed me to fix."
Fortunately, Dad seemed to have changed his clothes after showering. He didn't seem to think much of me being with Chaeyu.
"So, why?"
"Oh. You weren't in your room, so I wondered where you were. When did you get here?"
"I just got here with Chaeyu a little while ago."
"You fixed Chaeyu's stuff without even taking your clothes off? You take good care of her, huh?"
"Well... we're family."
I needed to change my clothes quickly. I didn't know when Mom might come home and notice something.
"I'm going to the convenience store."
"Now? Why?"
"...There's something I need to buy."
"Alright. Go ahead. And get Dad a cola on your way back."
"You should try getting closer to Chaeyu, too, Dad."
"I'll handle it myself."
I stepped out the front door immediately to destroy the evidence. Things that smelled like this were like durian; even having them for a day made the scent spread everywhere.
"Oh my, you startled me!"
"You're here...?"
The moment I opened the door, I ran straight into Mom. Both she and I were startled.
"Where are you going?"
"I was just heading to the convenience store."
"Is that so? Go and come back safely."
"Yes. I'll be back."
"You haven't eaten yet, right?"
"....Yes."
"Oh, honestly. I’ve set everything out. Hurry back so we can eat."
"Yes—"
In the blind spot where no one could see, the moment I tried to leave, she blocked me with her lips. The events of the day flashed through my mind again. Unconsciously, my hand grabbed Mom’s buttocks.
"...You said we shouldn't do this outside."
"We're at home."
"I suppose so..."
I couldn't say anything to Mom’s perfect logic. Instead, I answered with my cock, which had become erect once again.
"D-don't do that here, just go quickly."
"Yes..."
Seriously. Both of them were the same, being shameless after starting it themselves. And I was the one who accepted it, liking it all the same.