67. Birthday Gift
“Mom's heading out for the year-end party to meet some friends tonight, then going to watch the sunrise with the aunts. What about you two?”
“Nah, who goes sunrise-viewing these days? We'll just stay home.”
“It's not like we're walking—we're driving. What about you, Gyeo-ul?”
“...Mom, you're not gonna celebrate my birthday?”
“What do you mean? Your birthday's still three weeks away.”
“I don't even know when my lunar birthday is.”
“Mom'll take care of it, don't worry. When have I ever not grilled meat for you?”
There were less than 24 hours left until the end of the year. And it was also my little sister's birthday.
...And the day Mom would be out of the house.
Honestly, if push came to shove, I'd been thinking of just taking Gyeo-ul out somewhere.
It was supposed to be a Christmas present, but... on Christmas Eve, my brain had been burning up so much I'd forgotten all about it.
“Anyway, you two should go out too. Don't just stay cooped up at home. Meet friends or something. Or just wander around outside.”
“I've actually been looking for part-time jobs lately. ...With her.”
“You two working together?”
“Better than her doing it alone, right? I can keep an eye on her.”
“Keep an eye? Just admit you're worried about your little sister. It's creepy when a big lanky guy like you says it like that.”
“Yeah, you're creepy, oppa.”
“...Yeah, yeah.”
...Truth be told, if my sister was working part-time alone, could there really be no creeps hitting on her? There'd definitely be some. This wasn't just because of recent events—it was something even a normal big brother would worry about.
Her looks... well, I couldn't judge objectively then or now. But her big tits? That's objective—no subjectivity there.
“Anyway, Mom's heading out for lunch. If it's cold, just lie under the electric blanket. Don't shiver on the sofa like last time.”
“...Yes, ma'am.”
...I disgusted myself. Thinking about my little sister's breast size over meals was gross, and getting all kinds of ideas the moment Mom mentioned leaving was repulsive.
But you keep glancing at me too. We're even.
Before noon, Mom left the house.
...Ha. I knew I shouldn't. I knew it was dangerous. But knowing doesn't mean I can stop.
Look at her. Curled up under the electric blanket in a tank top and shorts, squirming while watching TV. Fresh out of the shower, shampoo scent wafting, already working up a sweat again.
“...Oppa. Why do you keep looking at me like that?”
“It's your birthday.”
“You got a birthday present for me?”
“Think about it.”
“What the hell.”
Just the two of us home now. ...She wouldn't resist if I pounced. I knew it was trashy starting right after Mom left, but I couldn't hold back.
Let's get it out of our systems three times a week. Better to indulge now so it's easier to hold back when it's riskier.
“...Oppa, this is the living room?”
“So?”
“Mom's been gone less than ten minutes.”
“...And?”
I lay down next to my sister on the electric blanket, hugging her from behind like a koala. Her skin, warm and toasty. Slipping both hands under her T-shirt, I groped to my heart's content. That slightly firm belly. The ribs you feel if you press. Those plump, juicy tits. No matter how many times, they never got old.
“...Oppa, you don't just like my body, do you?”
“Nah. ...I like it 'cause it's you.”
“That's even more pervy.”
“I am a perv.”
“...Dog perv.”
Even in winter, midday sun blazing. Right in the middle of the living room where we'd eaten lunch as a family just hours ago. Even if the blanket hid what was happening below, our heads—the only exposed part—had long crossed the line.
Licking her nape, nibbling her ear. Every time she turned her head slightly, our tongues tangled. Rubbing my rock-hard cock against her ass through my pants. Deliberately avoiding her hole, just kneading around it, and she was the one making that needy face, craving more.
“Oppa. Cut the teasing... ”
“Not teasing. This is my way of showing love.”
“...You serious?”
“For like an hour.”
Not touching the dangerous spots, but stimulating all the sensitive ones enough to rile her up. My sister looked a bit pissed, frowning slightly as she reached back, fumbling toward my crotch.
I wasn't refusing, so I obediently shoved my pants down, exposing myself under the blanket. Her fingers found their target soon enough. Still not that familiar, but she knew what I wanted—stroking my cock slowly.
“Feels good...?”
“...Not bad.”
Reverse grip, and she couldn't see it, so no intense strokes. But her hand, warm from the blanket, had me leaking already, slick sounds echoing.
“...Don't cum like this, oppa.”
“Why not?”
“Clothes'll get dirty... blanket and mat too.”
“...After all this, hold back?”
“...Didn't say hold back.”
...I'd planned to torment her for an hour. No dice. I yanked her pants to her knees. No issues—she lifted her hips helpfully. Didn't remove her panties, just pulled them aside. Her pussy I could tease blindfolded now. A light touch, and she was already drenched. Warmer than usual, begging to be filled.
“...Oppa, it's my birthday.”
“Yeah.”
“So... I wanna do it my way today.”
“...Like what? Tell me.”
...Whatever she wanted, I'd take over when she tired. She'd wear out faster moving herself. Mom wasn't back till tomorrow. Plenty of time till sunrise.
“Oppa... you got any turn-offs?”
“Turn-offs?”
“...You know, stuff like that.”
“Big tits, long hair, slutty... and secretly doing bad things with a little sister who only has eyes for me forever? That's my fetish.”
“...Creepy. Dog perv.”
“Then what's yours?”
“Mine's...”
Her hand, still slowly stroking my cock, started pulling it closer. It brushed my fingers, which were loosening her up, then—by her will—slid inside her bit by bit.
“...Getting raped by oppa...”
I thought I'd stayed still, but suddenly my pelvis was smashed against her ass.
“Trapped in oppa's arms, can't move a limb... letting oppa touch wherever he wants...”
Like I was holding her down so she couldn't escape, she ground her ass back against me, coquettishly showing she had no intention of running.
“Till I can't breathe, taking it however oppa wants... then getting filled inside. ...By my own brother.”
She grabbed the back of my hand teasing her clit, placed it near her navel, and caressed it softly. Telling me it was wrong, while begging to be dirtied.
“After, you kiss me with that leftover-cum face and hug me tight... that's my turn-off.”
A weakness she could never tell anyone but her own brother—me. ...We were eerily alike. Fetishes, personality. Looks, everything. Siblings, after all.
“...How rough you want it?”
“Re...ally wanna do it... but if oppa starts... can't help it...”
“Till you collapse from exhaustion. That okay?”
“If you give me... a birthday present... might let you...”
Tension everywhere, but her panting was quieter than usual. We were stuck so tight, no big movements. Not thrusting so much as trying to wreck her womb, shoving deeper. My hands went beyond massaging her belly, pressing hard like crushing her insides.
“Hiiik... not there...”
“...Where?”
“Don't... press my belly... eep...”
A voice that might've made me ease up normally. But now, it was just coquettish pleading. No matter how much she pretended to hate or hurt, block her mouth and she'd melt. Giving up every last bit of resistance, clinging happily.
As we groped and sweated over each other, ...footsteps sounded.
I ignored them, plunging deep into her. The steps grew louder, familiar. Only when the door lock beeped did we barely separate, facing opposite ways.
“Mom's back~ Forgot my portable charger. ...Son, you hot? Sweating buckets.”
“No, it was... cold. We were under the blanket watching TV. She was raving about how warm the mat was, so I tried it—pretty nice.”
“Electric blankets are good, but turn down the temp. Don't sweat. Or layer up.”
“...Yes, ma'am.”
Evidence of our affair hidden under one blanket. Lower halves we couldn't even pull up in time. Electric blanket soaked in fluids. If caught, no surprise. Breath caught in my throat, but thankfully, our voices held steady.
“Ah, here it is. Mom's off again~ Bye~”
“...Have a safe trip.”
...Haa. Fuck. Close call. Anyone else, 100% busted. Mom not suspecting a thing saved us. One whiff of doubt, and she couldn't have been that casual.
Lucky. ...Not sure if really lucky.
“Huu...”
“...Oppa, my heart's gonna explode...”
“...”
...Heart pounding like mad, but the arousal hadn't faded.
“Wanna... go again?”
“...Yeah.”
Door shut, just us again—we overlapped once more, devouring each other. This time, not even stifling our moans.