Chapter 17

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Translator: penny

Chapter: 17

Chapter Title: Younger Sister's Forbidden Taste

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- Oh, Oppa...! Hn! Hngh, ha-ah!

"You're not supposed to touch down there. I told you just the nipples."

- U-uh... Oppa told me to... hn! So I did it just like you said...

"Pretend I'm sucking them with my mouth. Smack, slurp... schlop. Feel that."

- Ahn... Yeah, Oppa... hngh... y-you, it feels so good... just like you're really sucking them...

"Smack, slurp, smack smack smack... lick lick, smack."

The tiny nipples of my 'younger sister' that had been so small just moments ago were now swelling up as they rolled around in my mouth.

And across her breasts, the pale skin was already flushed red from the marks I'd left behind.

- O-O-Oppa! More, more... hn! Suck harder... hngh!

"Slurp, smack... smack. Like this?"

- U-uh yeah! More, moreee!

A massive moan erupted from the other end of the phone.

Her ragged breathing filled the line with heavy panting.

"You didn't just cum already, did you?"

- Hngh... hn! D-don't know... but ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠my panties feel... a little wet...

I slid my hand downward.

Beneath the soft panties, coarse hair and a humid heat radiated out.

"Touch over your panties. See how wet you are."

- Hn... Okay, hold on...

My 'younger sister' clenched her thighs, trying to block my hand's intrusion.

But when I nodded toward the phone, her eyes flashed, and she relaxed her legs.

"How wet are you?"

- U-uh... super wet... all sticky and slimy...

"Wanna slip your hand inside the panties?"

- C-can I... put it in?

"Hah... no. Just slide your hand under the panties."

- A-ahh~ Oppaaa... you're just gonna keep making me do stuff like this?

"If you don't like it, should I hang up?"

- ...Annoying. Just you wait 'til we meet next time.

"Got it, so hurry up."

I couldn't show it, but I was getting pretty nervous right now.

My 'younger sister''s body was steadily heating up, so results should be coming soon.

No, they had to.

- Hn... W-whoa... it's so... wet... ahn... I wish Oppa would just shove it in already...

"Shove what in?"

- Th-that thing...

"What thing?"

- O-Oppa... that thing down there...

"What is 'that thing'?"

I lifted one leg and straddled her belly again.

Then, gripping my cock with my right hand, I slid it between her breasts.

- C-c-cock...

"What do you want me to do with my cock?"

- P-put it... in my p-pu-pussy... pleaseee...!

I grabbed the cock that Shin Ju-hee was so desperately craving and shook it up and down.

My 'younger sister' tried to turn her head away, but I could feel her eyes sneaking glances.

"...Can't do it right now, so use your fingers instead."

- U-uh... gonna... put 'em in...

I couldn't hear the lewd squelching of her pussy walls soaked in juices.

Just Shin Ju-hee's sticky moans coming through the phone.

But beneath me, I could feel my 'younger sister''s heart pounding like it was about to burst.

If I exaggerated a bit, it felt ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠like an earthquake.

- Hn! Oppa, Oppaaaa...!

Thud-! Thud-! Thud-! Thud-!

My already rock-hard cock dripped long strings of precum from the tip.

The thread-like fluid splattered onto her breasts, making her jolt in surprise.

"Does it feel good... hah... when I fuck 'em?"

- Yeah! Uhn! Love it, Oppa's cock, hn! Feels so goooood...!

Her voice was so loud it glitched out with noise.

And soon after, she let out a sharp gasp, her breath cutting off like she'd passed out.

- Heuk! Hn, hngh! Hnngh...

Spluuurt—

And almost simultaneously, the cum shot out.

The thick, gooey fluid painted her breasts.

"Hn! Hngh!"

Caught off guard, she trembled violently, holding her breath just like her friend on the phone.

I placed my hand on her breasts and started smearing the cum all over her body.

"Hngh... haaaah..."

My 'younger sister' opened her mouth wide.

Gasping for air, she panted heavily for a long while.

I slowly brought the cum-smeared hand to my mouth.

Then slipped my index finger inside— and suddenly her mouth clamped shut.

"Hngh...! Hngh...!"

She seemed startled herself, like she'd closed her mouth purely out of surprise.

She quickly opened it again, fidgeting restlessly.

"J-Ju-hee... did you cum?"

- U-uh... yeah... I can't... move right now... what do I do?

"Hah... felt that good?"

- Yeah... feels like I'm floating away...

At Shin Ju-hee's vivid recap, my 'younger sister''s eyes wavered again.

Deciding this was enough, I used the excuse of handing the phone back to quickly hang up.

"Hah... what if you bite that hard?"

"...S-sorry. Didn't mean to, uh, anyway, sorry."

Had she forgotten she was tied up and getting ravished by me? She apologized for my balls first.

"If you're sorry, wanna clean this up?"

I held out my hand, still sticky with cum.

Her eyes trembled fiercely again... but it wasn't pure disgust.

"You bit me, so you owe me this much."

"...Still, this is kinda..."

Her gaze grew even more conflicted.

From my perspective, it was obvious what she was agonizing over.

Probably some heated internal debate about me being her brother, family, siblings— whether this was okay.

But her pussy had been drenched in juices for ages, and she was still getting so turned on looking at me.

In a situation like this, there was only one reason lust wouldn't rise.

It was a system tip I'd seen once before.

Because we were bound by family ties, her honest body reacted differently from her mind, which denied it.

"Not curious?"

"...About what?"

"Not curious what Shin Ju-hee thought tasted so good? This cum?"

"...N-no. Not curious."

I slowly brought my hand to her lips again.

My 'younger sister' clamped her mouth shut and glared at me with determined eyes.

"Mmph! Mmmph!"

But my finger touched her lips.

The cum-coated digit slipped between them.

"Taste good?"

"Mmph, mmph!"

She shook her head, trying to dodge with her teeth, but the cum just smeared across her face, making a mess.

"It's okay. It'll taste good."

Her struggling started to die down.

My 'younger sister' realized there was nowhere to escape while tied up.

"Heh, hek, hngh..."

I timed it with her breaths, shoving my finger into her mouth.

Her teeth scraped my skin, and her soft tongue welcomed the tip.

"Hngh, there we go. Good girl."

She was trying to push it out with her tongue, but it just looked like she was lavishing it with affection.

And as she carefully chewed while watching my eyes, it only gave me ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠pleasant stimulation.

"See? Tastes good, right?"

My finger came out clean, coated in her saliva and tongue.

The slippery cum had all been wiped away, swallowed down her throat.

"Your cheeks are so soft too."

I scraped the inside of her cheek, gauging her reaction in turn.

"Hek, hi... hek..."

"Ticklish?"

"U-uh huh... c-can't... breathe..."

Her voice had softened considerably.

She gulped down her throat and subtly rolled her tongue, licking my finger.

She'd realized it instinctively.

She's caressing my finger right now, pretending not to while doing exactly that...

That was why I pulled my finger out without hesitation.

"Ah..."

My 'younger sister' let out an unconscious moan of disappointment.

This was working.

It was definitely going to work.

"...Want more?"

"......"

No answer.

She even closed her eyes.

Pretending to be asleep, maybe.

So I untied the ropes binding her wrists.

Then slid down and undid the cords around her ankles.

Her limbs naturally splayed open, revealing panties soaked sticky with her juices.

"...Really asleep?"

"......"

A meaningless question.

After all that chaos earlier, no way she could fall asleep this fast.

Thud.

I sat comfortably beside my 'younger sister'.

Brought my hand to her mouth.

‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠

"Open wider."

"Ah, aaah..."

My fingers vanished one by one into her slowly parting lips.

When they emerged again, they glistened with her saliva.

"...Bigger this time."

"Ah, ah..."

"A little more."

"Aaaah..."

I lifted one leg again.

This time, planting my ass on her breasts instead of her belly.

"Hngh!"

"It's fine. I won't put weight on you."

"Heh, heeh... haaah..."

I brought my glans to her lips.

She trembled at the size.

But that was it.

"Hngh... clean it... haaah..."

She pointed her tongue.

And without being told, she licked around the slit, rolling her tongue.

The slit naturally parted at her tongue's touch, and she lapped and sucked the precum inside, swallowing it.

A bit clumsy, but that only made it more exciting.

The fact that my 'younger sister' had my cock in her mouth and was sucking it made my heart race anew.

"...Taste good?"

"Smack, schlop... lick, gulp."

No verbal answer, but I didn't need one.

"Hngh... gonna cum, haa, gonna cuuum..."

Her tongue moved faster.

Her mouth opened wider.

And with a spluuurt— far more cum than before flooded into my 'younger sister''s mouth.

"Gulp, gulp, kgh! Cough! Cough! Gulp."

Maybe overwhelmed by the volume, she hacked loudly, then quickly took my cock back in and swallowed the rest.

"Haaaah... so good..."

It was a sigh of deep relief from the core of my body.

"Good" wasn't empty words, but right now, I was even more relieved by the system message.