Out of Her Sister's Sight

Taeseok turned his head toward the room to check.

The door was shut.

Whether it had opened and closed again, or whether he had simply misheard, he could not tell.

Well… either way, it doesn't matter.

He smirked and dug his fingers harder into Eunjeong's ass, then began to drive into her with even greater force.

Meanwhile, inside Eunsu's room.

Eunsu stood with her back against the door.

She, too, wore no bra—only a loose T-shirt and a pair of extremely short hot pants. Her thighs, toned and springy from years of training, and the round swell of her ass peeked provocatively from beneath the tiny shorts. Under the thin fabric of the shirt the full shape of her breasts and the hard points of her nipples stood out in stark relief.

Her mind was still flooded with the scene she had just witnessed.

Her older sister bent over the dining table, both hands braced on the surface, while ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠Taeseok pounded her from behind. Those lewd moans, the heavy bounce of her breasts, ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠the violent shake of her hips—it had lasted only a few seconds, yet the image was burned into her skull with merciless clarity.

She had already known about their relationship from what Taeseok told her the day before, but seeing it with her own eyes was a different kind of shock entirely.

Haa… how did my sister end up like that…

The sister she knew had always been quiet, composed, rational. That same woman was now thrusting her ass high in the air, getting fucked by a man years younger than her, rolling her hips obscenely and crying out in pure lust.

…Howling that filthy…

It was shocking.

And yet she understood it more than she wanted to. She had felt that pleasure herself—the moment Taeseok's cock pushed into her body. That overwhelming thickness and length, the scorching heat of his flesh slowly forcing her open, the sensation of her entire body melting into liquid fire. The memory still throbbed vividly inside her.

Without realizing it, Eunsu's hand had slipped inside her shorts. She wore no panties, so her fingers met her pussy directly—hot, slick, already soaked. She began to rub herself roughly.

She pressed her ear flat against the door, holding her breath, straining to catch every sound from the other side.

Through the wood, Eunjeong's stifled moans came through with perfect clarity.

"Haahng…! Taeseok… too… hard… your sister will wake… aaahn…!"

Hearing her sister's voice grow hotter and more desperate, Eunsu worked her fingers harder. In her mind she could see exactly how Taeseok was holding her sister, how that massive cock was churning deep inside her.

Eunsu clenched her teeth and pushed two fingers deeper.

"Ha… euh…"

Schlick, schlick, schlick…

She thrust them in to the knuckle and stirred, but instead of relief only a growing frustration filled her. No matter how roughly or how fast she rubbed, it never reached even half the pleasure Taeseok had given her the day before.

Why… why does it feel so weak…?

She gritted her teeth and attacked her clit with frantic circles. With her free hand she shoved her T-shirt up and ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠mauled her own breast, forehead pressed to the door. Her hot pants had already slipped halfway down her thighs; those thighs trembled, and clear fluid ran down her fingers.

Fingers alone could never fill her. The more she touched herself, the sharper the memory of being held by Taeseok became, tormenting her.

I want him to hold me again…

The thought startled her. She had already felt guilty enough for sleeping with the man her sister was seeing. Now she was masturbating to the sight of them and craving that same man all over again. She felt pathetic.

I don't know… I really don't know anymore.

Just to quiet the heat clawing at her, she closed her eyes and moved her fingers even faster. Soft, desperate little moans slipped past her lips.

…I want to feel it again… like my sister… no—harder than her… until I go crazy…

Beyond the door, Eunjeong's barely-restrained cries and the wet slap of flesh against flesh continued without pause.

Taeseok buried himself to the hilt inside Eunjeong and came with a long, shuddering groan. The sensation of his hot seed flooding her deepest place made her legs give out; she collapsed against the table.

He slowly pulled free. Looking down with satisfaction at the white fluid that immediately began to spill from her pussy, he spoke while straightening his pants.

"Doing it before breakfast… feels better than I expected. I should change the routine."

A thick mixture of his cum and her juices still ran down her thighs. Eunjeong exhaled shakily, snatched several tissues from the box on the table, and wiped herself clean between her legs.

"You came so much again today. It's amazing how much you shoot every single time."

She took more tissues and carefully cleaned her pussy once more.

"Yeah? That much?"

"Mm… a lot… no matter how much I wipe, it just keeps coming out."

Holding the hem of her dress slightly lifted, legs parted just enough to wipe herself, she looked ordinary and yet unbearably erotic. Embarrassed by the sight she was giving him, she turned her body a little away.

"Don't stare like that… it's embarrassing."

"I can't help it… you look too pretty like this…"

At that moment the sound of Eunsu's door opening reached them. She stepped out of her room.

The loose T-shirt showed the blurred silhouette of her body; her long legs flashed between the short hot pants. But what caught the eye first was her face—flushed, pupils slightly unfocused.

The instant Taeseok saw her he called up the status window.

He laughed quietly to himself.

So I didn't mishear earlier. She watched us. And she must have touched herself afterward. No other way her Emotion Level would climb like this.

The moment their eyes met, Eunsu looked away. She forced a casual air and walked toward the kitchen.

"Hello… Auntie."

Taeseok greeted her with deliberate brightness.

"…Yeah. So you came, Taeseok."

Her voice sounded strained and slightly cracked compared to yesterday. She kept stealing glances at him as she sat down at the table. The way she pressed her thighs together suggested the inside of her shorts was still wet.

Eunsu avoided her sister's eyes completely. Eunjeong did the same—lips pressed tight, hands fussing needlessly with the dishes on the table. The air between the two sisters tangled into something thick and awkward.

In the middle of it all, only Taeseok remained completely at ease.

Once every dish Eunjeong had prepared was on the table, the three of them sat down together as if nothing were wrong.

It looked natural enough.

Yet Eunjeong's face was still flushed a deep red, and Eunsu kept crossing and uncrossing her legs, painfully aware of Taeseok's gaze. He looked from one sister to the other with a faint, almost invisible smile.

On his right sat Eunjeong—the woman he fucked every day. Even now his cum was probably still leaking down her thighs under that dress, yet she was carefully placing side dishes into his rice bowl with practiced calm.

On his left sat Eunsu—the woman who had taken his cock for the first time yesterday and who, only moments ago, had leaned against a door and pleasured herself. Every time their eyes met she glanced away, unable to keep her thighs still.

Taeseok lifted his spoon and laughed inwardly.

This feels strange. Just sitting here eating with two women I've already fucked… it's making me so hard I can barely breathe.

Eunjeong still believed her sister knew nothing about her relationship with Taeseok. That was why she was being so careful, so shy. Eunsu, on the other hand, knew everything—how deep that relationship ran, how obscenely her sister screamed while taking Taeseok's body… and that she herself had already mixed her own body with her sister's man. That knowledge made it impossible for her to look Eunjeong fully in the face.

"The food is delicious today, Auntie."

Taeseok spoke in a deliberately gentle tone. His eyes drifted between Eunjeong's chest and Eunsu's thighs.

Eunjeong blushed and smiled softly.

"Really? I'm glad. Eat plenty."

Watching them, Eunsu felt a sharp, unnameable jealousy. The memory of Taeseok's cock filling her completely the day before rose again.

My sister has been receiving that paradise from him every single day… even without a husband… I'm jealous…

She set down her chopsticks and reached for her water glass. Her hand trembled slightly.

Is that why she became so beautiful? Well… if you come that hard every day… of course your body would change…

Taeseok savored every subtle expression and restless movement from both sisters. He spoke in a low, unhurried voice.

"The atmosphere today… feels a little special."

The single sentence made Eunjeong's face burn even hotter. Eunsu rubbed her thighs together and lowered her eyes.

Under that heavy tension the meal finally ended.

"You two go sit on the sofa. I'll just clear the table real quick and bring coffee and fruit."

Eunjeong smoothed her apron and forced a bright tone. Taeseok rose first and headed for the living room. Eunsu hesitated a moment, then followed, her steps stiff and unnatural. Her eyes kept flicking toward the kitchen.

Huh? Her Emotion Level rose even higher.

Taeseok looked at Eunsu, who had deliberately chosen the far end of the long sofa, trying to keep her distance. He moved casually and sat down right beside her—close enough that the kitchen's line of sight left them in a small blind spot.

The moment he settled next to her, Eunsu's body jerked. She quickly lifted her hips, trying to create space, but she was already at the end of the sofa; there was nowhere left to retreat.

"Hey… sit a little farther away."

She whispered in a small, urgent voice. Her eyes kept darting toward the kitchen. Her ears were scarlet all the way to the tips, and her thighs were clamped tightly together.

Taeseok only closed the remaining gap and spoke in a low murmur.

"Why? Do I make you uncomfortable?"

Eunsu bit her lip. Her fingers fidgeted restlessly on her knees. The body that had completely collapsed under him yesterday was already heating up again just from the warmth of his presence. And the knowledge that her sister was washing dishes only a few meters away made her almost painfully tense.

"Of course you're uncomfortable. How could I feel comfortable? And my sister is right over there… don't do this. Move away."

Her voice was barely above a breath. Anxiety filled her eyes, yet when she glanced down at her own leg pressed so close to his thigh, an unmistakable hunger flickered there as well.

Watching the number climb even while he did nothing, Taeseok smiled. He slipped an arm around her waist and pulled her body flush against his own.

Eunsu went rigid.

"You… what are you doing?"

"This morning… you and your sister and me… you saw everything, didn't you?"

He took her hand and placed it on his thigh.

"…What are you talking about."

The denial came far too late. Taeseok breathed hot air against her ear and whispered, slow and low.

"Did watching us turn you on? Did you take care of yourself with your fingers? That alone… must have felt pretty empty."

Eunsu's eyes shook violently. She looked up at him with a mortified expression, trying to put distance between them, but his arm was already locked firmly around her waist; she could not pull free.

"H-how… how do you… aaahn~ don't…"