As dinner wrapped up, Jinwoo caught his sister's eye. Unsure where to look, he kept his head down and shoveled food into his mouth.
That's when his mom chimed in.
"Mom's gonna shower first, so Jinwoo, you handle the dishes and clean up, got it?"
Embarrassed and ashamed at being caught by his sister, Jinwoo avoided eye contact.
He just pushed his rice and side dishes around his plate and mumbled a response.
"Got it."
Mom then instructed Sohee and Minji as well. "You girls just help move the dishes."
"Okay, got it," their responses echoed.
"Minji, are you sleeping in Mom's room again tonight?"
Getting up from her seat, Mom asked Minji in a tone that felt like she was doing a headcount on a group trip.
"Yeah, with Mom..."
Minji trailed off shyly, seeming embarrassed to answer in front of her brother and sister.
"Alright," Mom calmly replied and headed downstairs to shower.
"Bro, should I help you with the dishes?" Minji, who had quickly stood up to help, asked eagerly.
"No, it's almost done. I can handle it myself." Jinwoo had to decline Minji's sweet offer, as he was still dealing with an unresolved erection.
After moving the dishes from the table to the sink, Sohee and Minji headed back to their rooms.
Jinwoo had felt a burning shame when his sister caught him ogling his mom's ass moments earlier. However, his erection didn't subside. Far from it, the shame acted like a stimulant, igniting an even greater arousal.
Jinwoo finished the dishes and headed back toward his room. From the downstairs bathroom, he could hear the shower running.
The thought of his mom in there, naked and drenching her body, made Jinwoo's cock swell until it felt like it would burst.
There was a changing area outside the bathroom that doubled as a laundry room, screened off by a curtain to block the view from the living room. However, if you wanted to, you could peek through at just the right angle.
Through the gaps in the curtain, Jinwoo spotted clothes in the laundry basket. A striking piece of purple fabric caught his eye. It was his mom's underwear, recently discarded.
Those purple panties had been cradling her pussy just moments ago.
Jinwoo quietly slid the curtain aside and stepped into the changing area. The sound of the shower was louder now. Through the frosted glass door, he could barely make out the silhouette of his mom's body.
Next to the basket lay a pair of panties and a light purple silk pajama set his mom would change into. Jinwoo looked around the room one last time before taking a deep breath.
He grabbed the panties his mom had taken off and, making no noise, returned to his room, gasping for breath.
He locked the door and sat on the bed. He freed his throbbing erection, which felt ready to burst through his pants.
Placing his cock against the fabric that had touched his mom's intimate mound, he wrapped it around himself. The soft touch of the fresh panties transmitted directly onto his shaft.
In that moment, his mom once again became Jinwoo's slave.
Imagining his naked mom crouching on the floor, he visualized pushing her from behind, forcing her to arch her back. His cock ruthlessly penetrated her as she was pressed against the floor.
He wrapped his arms around her waist and rode her relentlessly, shaking her without pause. It was as if he was trying to start a fire, his large cock ceaselessly rubbing inside her.
The moans leaking from his mom were no longer dignified or authoritative. After a while, he let go of her waist and started slapping her ass.
Slap! Slap! Slap!
"Ah!" Her moans, mixed with screams, leaked out in his mind.
Unable to hold back any longer, Jinwoo exploded into the panties.
Then came the post-masturbation emptiness. Wiping the semen-stained panties with a tissue, Jinwoo felt an irreversible sense of regret.
He balled up the stained tissue and tossed it deep into the trash can. Checking the lid to make sure it was closed tight to contain the smell, he put on his pants.
He stuffed the damp panties into his pocket. Then, he lay sprawled on the bed, overwhelmed with self-loathing. Recalling the contemptuous look in Sohee's eyes during dinner made him feel even worse.
Jinwoo clutched his head in torment.
Jinwoo crashed hard after jerking off and dozed for a bit. When he woke up, it was nearly 10 PM. It was the hour when his family was usually asleep.
Fumbling with the panties in his pocket, he confirmed it wasn't just a dream. The thought of returning them to the basket spurred him to get up.
He needed a shower too. Grabbing a fresh pair of boxers, he cautiously opened his door and peeked outside. The coast was clear, so he tiptoed down to the laundry room.
The clothes previously in the basket were now in the washing machine. He buried his mom's panties among the other laundry and stripped off his clothes. After tossing his things into the washer, he headed for the shower.
As he washed, he replayed the day's events: Daeho spanking Aunty Gyuri, masturbating to his mom for the first time, getting busted by Sohee, and sneaking the panties.
He felt completely drained, yet there was a strange sense of fulfillment, as if he had tamed his raging urges.
After the shower, he dried off. Thinking everyone was asleep, he walked out of the changing room in just his boxers.
That's when he saw his mom coming out of the master bedroom, carrying Minji.
"Jinwoo, are you just out of the shower? It's late; try to do it earlier next time," his mom remarked.
"Uh... mom... yeah, I just finished," Jinwoo replied awkwardly.
He was embarrassed to be in his underwear, especially given the stark contrast between the mother he had imagined earlier and the one standing before him.
"Didn't I tell you before not to wander around the house in just your underwear?"
"Sorry, I thought everyone was asleep."
"Minji and Sohee are here too. You're not a kid anymore, Jinwoo. You're in second grade," she reminded him.
"Yeah, I got it. I'll be careful, Mom."
As Jinwoo grew up, the house rules had changed. Until he started middle school, it was common to see family members lounging in their underwear. Neither Sohee nor Minji had qualms about it, and the same went for his parents.
Reflecting on it, Jinwoo remembered his oldest sister, Yejin, wandering around in her underwear until her second year of high school. He even had memories of Yejin, post-shower and braless, nonchalantly walking around in front of their dad.
"Are you moving Minji to her room?" Jinwoo asked, seeing his mom holding her.
"Yeah, could you open her door for me?"
Jinwoo quickly went ahead, opened Minji's door, and turned on the light.
Watching his mom tuck her in, Jinwoo asked, "Aren't you going to sleep together tonight?"
His mom sighed. "Sleeping together is only for sometimes. It's uncomfortable for me to have someone beside me. Plus, Minji insists on keeping the lights on in the master bedroom, which keeps me from sleeping deeply. She needs to start sleeping alone. Oh right, you went to Gyuri's today, didn't you?"
Caught off guard, Jinwoo responded awkwardly, "Uh... yeah..."
"Weren't you supposed to borrow an eye mask from Gyuri? I thought you'd have mentioned it."
"An eye mask?"
"Yeah, since Minji sleeps with the light on, I might need one for a while. Gyuri has a lot of those things," she explained.
Jinwoo's heart raced as he remembered the BDSM tools Daeho had mentioned Gyuri owned.
"Gyuri is coming over this weekend anyway, but since I need it now, could you stop by her place after school tomorrow and pick it up? I'll talk to her in the morning."
"Yeah, sure. I'll go after school," Jinwoo replied, excited by the unexpected plan involving Aunty Gyuri.
"Phew, Minji is getting so big, it's getting hard to carry her," his mom said as she settled the girl in.
"That's kids for you... they grow up fast," Jinwoo responded mechanically.
"Ha-ha, if someone heard you, they'd think you were Minji's dad. You're only about three years older than her, right?"
His mom teased him playfully, using formal language. Hearing her use formal speech made Jinwoo feel a strange emotion.
Plus, being called Minji's dad, wasn't that indirectly calling him her husband?
A peculiar thrill surged through him, different from the excitement of his earlier masturbation.
"But still, you're Minji's brother, so keep looking out for her, okay?" his mom said, gently stroking Minji's head. She seemed increasingly worried about the girl's attachment to her.
"Don't worry, Mom! I'll take good care of her," Jinwoo reassured her.
"Then, in that spirit, why don't you start moving Minji to her room at night?"
"Huh?"
"You're up late anyway, right? By this time, Minji is usually asleep. Come and turn off the lights in the master bedroom and move her. It'd be a big help to me," she explained, her playful tone turning into a genuine request.
It wasn't a difficult favor.
In fact, it seemed like a stroke of luck to Jinwoo; he'd get to see his mom in bed every night.
"Yeah, sure, Mom," Jinwoo quickly agreed.
That's how Jinwoo ended up visiting the master bedroom nightly to move Minji.