Teaching My Sister Her Place
Why, and how the hell did things end up so twisted?
I definitely never wanted to touch my own family.
“M-Minhyuk...? My body... feels so weird...♡”
Up until that point, I hadn't even imagined my family lusting after me.
But now, that impossible scene was unfolding right in front of my eyes.
“It... keeps throbbing down here...♡”
She was grabbing my hand and pressing it against her lower belly, where it pulsed desperately. If this wasn't her craving me, then what the fuck was it?
Ever since we'd been left alone in the room today, Yuri unnie had been acting off.
It started with her clutching her head and rambling like a maniac, then collapsing the instant our bodies touched.
And the reason? Her legs gave out because it felt too good.
I couldn't look at Yuri unnie the same way anymore.
Before, she was just my blood relative with killer looks. But from now on, I'd see her as...
“Haaang♡ Ahng♡ Ungh♡”
...a lowly bitch in heat, desperate for me.
And bitches like her, who didn't know their place and obsessed over me, needed to be put in line—properly trained.
Even if she was family, I couldn't let this slide.
Until now, I'd never viewed my family as anything beyond mother-son or siblings.
Sure, there'd been a few unavoidable hard-ons here and there, but they always left me feeling ashamed and pissed off.
But now that I knew my own big sister was lusting after me? Everything changed.
She was too distracted by her overheating body to notice, but my face was basically expressionless.
As I slipped my fingers into her panties to start fingering her, I said flatly,
“I'm gonna give you a one-on-one lesson now, so remember everything I teach you today.”
“U-Un♡”
I slid my index and middle fingers between her thick pussy lips, then her ring and pinky too, rubbing them all along her folds.
-Squish squish
“Ahiii♡ Uiiing♡”
She hadn't even taken a full finger inside yet, and Yuri unnie was already writhing, trying to squirm away.
I pinned her thigh down with my left hand.
“Stay still, unnie.”
“Ahhng♡”
Her nasal moans echoed nonstop through the room.
Once I figured she'd adjusted a bit, I straightened my middle finger and shlup—pushed the first knuckle into her pussy hole.
-Schlup
“Hngoooh♡ Ah... inside... it's sho gooood...♡”
Her inner walls didn't push my finger out like an intruder—instead, they welcomed it, clenching and sucking it deeper.
Whoa... it's gripping so tight...
Even just my middle finger got squeezed hard—probably because she was still a virgin.
I followed up by sliding my ring finger in too.
Thrusting them deep, I slowly explored her walls from the entrance inward, feeling every texture.
Then I hit a spot that bulged out more than the rest. I pressed down hard on it.
Yuri unnie's back arched, head snapping back as she came.
“That's your G-spot, unnie.”
“Hoooh♡ G-spoooot... I'm cuuuuming♡”
Pushing a little deeper, I felt something different.
Hymen.
Even in her third year of college, unnie was still a virgin.
In this world, sex wasn't common anyway—plenty of women stayed virgins their whole lives. Not that surprising.
With her hymen confirmed, I pulled my fingers out.
Her walls clung so greedily, it felt like they'd pull my fingers right off with a sticky tug.
-Pop
The moment my fingers slipped free, her pussy gushed love juices in a flood.
-Splurt splurt
“Heeek♡”
Her eyes rolled back as she slumped against me. I peeled back the hood of her cute, pea-sized clit—now rock-hard—and rubbed it with my middle finger.
Her body trembled violently as she started begging.
“Kyaaah?! M-Minhyukkk♡ Stooop♡ I'm gonna diiiie♡”
The tidal wave of pleasure must've overwhelmed her mind.
Time to send her over the edge big. I shoved my hand into her bra, groping her bare tits, while my right thumb pressed her clit and middle/ring fingers plunged back into her pussy.
I squeezed her G-spot and clit together, then pinched her nipple hard with my left hand.
Finally able to release, Yuri unnie squirted into the air with a scream, her orgasm hitting like a freight train.
-Pssshhhhhh shhhht
“Haaaaaaaah♡♡ Uheheeeek♡”
Her back bowed like a drawn bow.
Her squirt shot high enough to hit the ceiling before raining down on the hospital floor.
“Hee♡ Heek♡”
She went limp, panting dreamily. Her massive tits—definitely from Mom's genes—rose and fell, a single tear rolling down her cheek.
She looked totally confused about what had just happened to her.
“See that? That wasn't piss, so no need to be embarrassed. It's what comes out when you feel really good. Tell me—didn't it feel amazing?”
At my question, her lips curved into a sly smile, eyes sparkling as she whispered,
“Y-Yeah... it was gooood...♡”
She licked her lips with a grin, and my cock sprang to full attention.
Such a sly little cat.
“Ah... something's poking my butt...”
Impressed by her squirt show, my dick had stood up on its own, jabbing at her ass.
Yuri unnie, still dazed and panting from aftershocks, trembled intermittently.
“Ungh... Hngk...♡”
Seeing my clueless virgin sister like this woke the little devil inside me.
And it whispered:
This defenseless woman in front of you? She's not your sister anymore.
Who the hell lusts after their own family? Someone like this needs to be taught a lesson.
My way, of course.
I could paint her pure, blank-canvas mind any color I wanted.
“Hauup?! Uuub...”
I gave in to the temptation, grabbing her face and ravaging her mouth in a sloppy kiss.
She flinched back in surprise but soon submitted, matching my tongue's rhythm with hers.
Her first kiss, and she was damn good at it—natural talent for this stuff, apparently.
Never imagined she had it in her, but I liked this side of her.
The sluttier she was, the better for me.
I swirled my tongue wildly, marking every corner of her mouth before pulling out.
“Pah... haa... haa...♡”
Her face flushed beet red again, pupils unfocused and weak.
One kiss had wrecked her this bad. Even I was impressed.
She'd fully surrendered her body to me, mind blank.
“Alright, let's review what you've learned so far. First: fingering your pussy. That's masturbation—don't damage the barrier inside. Super important.”
Her dazed expression strained to absorb my words.
“Second: your G-spot's a little past one knuckle in, the bulging part. Press it while you masturbate, and it'll feel incredible.”
“Feels... gooood...♡”
“Last: kissing. One way lovers confirm their feelings. Lips together, tongues rubbing, swapping spit.”
“Love...♡”
She just giggled dopily through my recap.
No clue what was in her head—kinda creepy—but I shrugged it off as fine and checked the wall clock.
Forty minutes with her already. Needed time to clean before the next person, so a little buffer.
“Unnie, snap out of it. Time to go.”
“Hee...? Al-Already?!”
She glanced at the clock—twenty minutes left—and pouted, glaring at me.
“There's... still twenty minutes left!”
“Gotta clean up before the next one comes. You squirted pussy juice everywhere—who do you think's scrubbing it solo?”
“Ah... s-sorry...”
“Fine. Call it a twenty-minute save. After discharge, you can use your '20-Minute Free Pass' at home. Now go.”
“O-Okay...”
As she fixed her clothes and headed out, I caught the door just before it closed for one last request.
“Unnie, remember everything we did today and review when you can. You're the one and only Yuri unnie in the world to me, got it? See you at home this weekend. And send the next one in on the dot.”
“Y-Yeah...♡”
She bowed her head, twisting bashfully, then left.
Stuck cleaning this sex-stinking room, I grabbed the mop from the corner closet.
As I scrubbed the filthy floor, a scary thought hit me.
What if... Yuna and Mom too?
I shook it off and kept cleaning.
Meanwhile, Yuri staggered down the hall, her mind looping one thought endlessly.
'I love you I love you I love you I love you I love you I love you I love you I love you I love you I love you I love you I love you I love you I love you I love you I love you I love you I love you looooove♡♡♡♡♡'
We're... gonna be together forever♡