The footsteps stopped right outside Yumi's door.
Dad's voice came through, tired but curious.
"Yumi? Ji-eun? I swear I heard something again."
Min-jae pressed his back harder against the bathroom wall. His heart was trying to punch through his ribs. Yumi stood beside him, thighs slick with cum, her t-shirt barely covering her ass. Ji-eun had just stepped out into the bedroom to intercept.
Through the thin door crack they could hear her—calm, perfect, motherly.
"Honey, it's just the rain. You're exhausted. Come back to bed."
Dad hesitated.
"I thought I heard voices. Like… moaning."
Ji-eun laughed softly—light, innocent.
"You're imagining things. Jet lag playing tricks. I was humming to myself while checking on Yumi. She had a nightmare earlier."
A long pause.
Min-jae held his breath. Yumi's hand found his, squeezing hard. Her fingers were sticky.
Dad sighed.
"Okay. Just… come back soon. I missed you."
"I'll be there in two minutes," Ji-eun promised.
Her voice dropped lower, almost seductive.
"I'll make it worth waking up for."
Dad chuckled, footsteps retreating.
The master door clicked shut again.
Ji-eun slipped back into Yumi's room and locked the bedroom door this time. She leaned against it for a second, robe hanging open, tits rising and falling with heavy breaths. Then she looked at them—eyes dark, hungry, relieved.
"He's out like a light," she whispered. "We have maybe thirty minutes before he wakes up looking for me."
Yumi let out a shaky laugh. "That was too fucking close."
Ji-eun crossed the room in three steps. She grabbed Yumi by the waist and kissed her—hard, possessive. Yumi moaned into her mouth, hands sliding under the robe to cup Ji-eun's ass.
Min-jae watched, cock already thickening again. The sight of his stepsister and stepmother tangled together—tongues sliding, bodies pressing—was too much. Guilt still gnawed at the edges, but it was quieter now. Drowned out by need.
Ji-eun broke the kiss and looked at him.
"Strip, son. Mommy wants to watch you fuck your sister again."
Yumi turned, eyes glassy with lust. She pulled her t-shirt off completely, standing naked except for soaked panties. Her small tits rose with every quick breath, nipples tight. Cum still leaked from her pussy, trailing down her inner thighs.
Min-jae shed his clothes fast. Cock sprang free—thick, veined, glistening. Yumi licked her lips.
Ji-eun pushed Yumi onto the bed on all fours.
"Ass up, baby girl. Show your oppa that pretty pussy."
Yumi obeyed, arching her back. Her ass lifted, panties pulled to the side. Pink folds glistened, swollen from earlier. Cum dripped out slowly.
Ji-eun knelt behind her, spreading Yumi's cheeks.
"Look at that, son. Your sister's cunt is dripping for you. Still full of your cum."
Min-jae groaned, stepping forward. He rubbed the head of his cock along Yumi's slit, coating himself in their mixed juices.
"Fuck… Yumi…"
Yumi whimpered. "Please, oppa… put it in."
Ji-eun guided him, fingers wrapping around his shaft.
"Slow at first. Let Mommy feel how deep you go."
Min-jae pushed in. Yumi's pussy swallowed him inch by inch—hot, tight, slick. She moaned long and low, head dropping to the mattress.
Ji-eun kissed Yumi's spine. "Good girl. Take your brother's cock like Mommy taught you."
Min-jae bottomed out, balls pressed against her clit. He held still for a second, savoring the squeeze. Then he started thrusting—slow, deep rolls of his hips.
Yumi pushed back to meet him. "Harder, oppa… fuck me harder."
Ji-eun slid underneath Yumi, sixty-nine position. Her tongue found Yumi's clit while Min-jae pounded from behind. Ji-eun's own pussy hovered near Yumi's face.
Yumi dove in, licking Ji-eun eagerly. "Mommy tastes like oppa…"
Ji-eun moaned into Yumi's clit. "That's right, baby. Clean Mommy up while your brother breeds you again."
Min-jae gripped Yumi's hips tighter. Skin slapped against skin—wet, obscene.
"Fuck… your pussy's gripping me so tight, Yumi…"
Ji-eun reached up, fondling Min-jae's balls as he thrust.
"Fill her, son. Pump another load into your little sister. Make her belly swell like Mommy's going to."
Yumi cried out around Ji-eun's clit. Her body shook. Orgasm hit her hard—pussy spasming, milking Min-jae's cock.
He couldn't hold back.
"Gonna cum… fuck!"
He slammed deep and erupted—thick spurts flooding Yumi's cunt. She moaned, tongue still working Ji-eun's clit.
Ji-eun came next—hips bucking, juices coating Yumi's face.
"Yes… good children… Mommy's so proud…"
They collapsed in a sweaty heap. Breathing ragged. Bodies trembling.
But then—the master bedroom door opened again.
Dad's voice, louder this time.
"Ji-eun? I'm coming to look for you."
Footsteps in the hallway—heading straight for Yumi's room.
The lock was on.
But Dad had a key.
Ji-eun's eyes snapped wide.
"He's going to open it."
Yumi whimpered.
"Oppa… what do we do?"
Min-jae pulled out, cum dripping from Yumi's pussy onto the sheets.
The key turned in the lock.
To be continued…
Dad is turning the key. The door is about to open. What happens when he sees them?