Chapter 397 (Se-hee, Mom)
Translator: RaidenTL
Chapter 397 (Se-hee, Mom)

(Seon-mi)
Si-woo looked quite satisfied with Se-hee Noona’s reaction.
He swung his penis once more, letting it hit her forehead with a distinct thwack.
The moment his penis struck her forehead, Se-hee Noona flinched again, her face contorting.
Si-woo’s pre-cum began to drip down onto her brow.
"I’m going up to the second floor, so clean this up and come over quickly!"
Si-woo looked down at Se-hee Noona’s face, which was now smeared with fluid, and spoke with a triumphant smirk.
Her face flushed a deep red from the humiliation, Se-hee Noona exhaled a ragged, heated breath.
Leaving her behind, Si-woo picked up his crossbody bag from the floor and headed to the second floor to change his clothes.
* * *
Back in his room on the second floor, Si-woo pulled out a neat-looking green short-sleeved t-shirt and beige cotton pants from his closet and put them on.
Over the shirt, he threw on a thin white cardigan with pockets.
As if it were the most natural thing in the world, he tucked the center of his erect shaft into his waistband and covered the protruding top part with his t-shirt.
Then, he buttoned up the cardigan to ensure the erection was almost invisible.
After skillfully concealing his penis and finishing his outfit, Si-woo checked the waterproof bandages he had kept in his bag.
These were intended to fix the vibrator onto his mom’s clitoris.
Once he confirmed the bandages were there, Si-woo paused for a moment as if deep in thought, then walked over to his desk and pulled out a box of condoms from the drawer.
The thought occurred to him that he might end up having sex while meeting his mom out today.
His penis throbbed just at the thought of having sexual relations with her.
Si-woo slipped the box of condoms into his cardigan pocket and stared at his smartphone, reflecting on everything.
The conversations he had shared with his mom in their 1:1 chat room, and the countless exchanges regarding their master-slave relationship in the group chat...
The dialogue was filled with high-level obscenities that would have been unimaginable just a month ago.
At times, it felt like roleplay that had started as a joke, but at other times, the conversations were so dizzying and intense that he wondered if such things were even possible.
Whenever things reached a point that should never happen between a mother and son, his mom would use the excuse that it was all just a "game" to escape back into their inverted roles.
In those conversations with his mom—a tug-of-war between play and reality—Si-woo had certainly felt a thrilling sense of excitement.
However, now that he was able to have sex with most of the family members without hesitation, Si-woo felt the need to leave that thrill behind and clearly define his relationship with his mom.
Even if they returned to a normal relationship in front of others, he wanted her to be acting the part of a normal mother, rather than acting out an inverted relationship.
To achieve that, he needed to firmly engrave in her mind that this wasn't some roleplay started as a joke, but a Master-Slave Contract relationship that had existed since before he was even born.
Si-woo searched his smartphone for the photo of his mom’s Slave Contract that he had taken in Se-jin Noona’s room yesterday.
The Slave Contract his mom had entered into with his father, Yoo Jin-seong...
Her handwritten signature and the photo of her attached to the front page proved beyond a doubt that she was the one who had signed it.
His mom likely didn't know yet that Si-woo had found her Slave Contract.
Si-woo had been able to find it using the key Se-hee Noona had received from Se-jin Noona.
It seemed Se-jin Noona, who had been in a secret relationship with their father, had received the Slave Ledger from him and had been keeping it all this time.
His mom’s Slave Contract had been kept inside this very house the whole time, even while Si-woo remained unaware.
Si-woo intended to confront her with the clearest, most undeniable evidence of the secret they both vaguely knew, thereby subordinating her to him completely.
According to the terms of the Slave Contract, his mom was already no different from his property.
Would she still try to claim the relationship of mother and son instead of master and slave after seeing the contract he had found?
Si-woo tapped the photo of the Slave Contract and uploaded it to the text input field of his chat with his mom.
Just before hitting send, his heart hammered against his ribs as if it might explode.
He pressed the send button on the screen.
The photo of his mom’s Slave Contract was uploaded to the chat window.
Without waiting for her confirmation or a reply, Si-woo immediately switched his phone to the standby screen, grabbed his bag, and headed down to the first floor.
* * *
When Si-woo reached the living room, Se-hee Noona was nowhere to be seen.
He could hear faint signs of life coming from Se-jin Noona’s room.
It seemed Se-hee Noona had gone in to check on Shin-bi Noona’s condition.
On the kitchen table sat the vibrator he had ordered Se-hee Noona to bring from Se-young’s room.
Si-woo opened the vibrator’s operation app on his smartphone to check its status.
The battery level had increased to about 70%.
That was more than enough battery life to enjoy themselves on the way back from the mart near the station.
With a satisfied expression, Si-woo packed the vibrator into his bag.
Just as he was about to leave the house, a shopping bag on the living room floor caught his eye.
It was the shopping bag containing his mom’s red bikini swimsuit.
It was the one he had bought at a shop before returning home from the department store in a call van with his sisters.
Si-woo pulled out the boxed swimsuit from the bag.
The red scraps of fabric looked far too small to fully cover her breasts and groin.
After thinking for a moment, Si-woo packed the red bits of cloth back into the box and picked up the shopping bag.
Now fully prepared to see his mom, Si-woo went to the entryway and put on his shoes.
"I’m going to go pick up Seon-mi!"
Si-woo shouted loudly enough for everyone in the house to hear and stepped outside.
* * *
Concealing his raging erection with his bag as he walked, Si-woo checked the chat window on his smartphone.
His mom had already seen the photo of the Slave Contract he sent from home.
He expected her to say something in response to seeing the contract he’d discovered...
Though she hadn't replied, her silence alone was enough for Si-woo to feel her agitation.
Before he knew it, Si-woo had reached the area near the subway station where the mart was visible.
[Mom, I’m at the subway station! I can see the mart now~ Where should I go?]
Si-woo sent the text after arriving near the station.
[I told you the mart! A mart is a mart! Where else would you go?]
His mom replied with a text that sounded intentionally annoyed, without mentioning a single word about the Slave Contract.
[No, I just thought we might miss each other if you were still inside~ That’s why I asked~ Did something bad happen, Mom? Why are you so cranky? lol]
Si-woo sent a playful reply, teasing her for her prickly reaction as she tried to ignore the contract he’d sent.
[-_-^ Just come to the front! In front of the mart!]
[When I say meet at the mart, it usually means the front. Why are you asking if it's inside or outside?]
[Why do you always make me say things two or three times?!]
His mom was venting her frustration, even using a pouting emoji.
[Okay, okay~ I won't make you say it twice. I'm almost there, so wait for me! Hahaha]
Despite her seemingly annoyed texts, Si-woo found her reaction adorable and spoke soothingly to her.
* * *
During the entire walk from the house to the mart, Si-woo had been cycling through a thousand different thoughts, half-worried and half-expectant.
Perhaps the thing his mom wanted to talk to him about was ending their current relationship and returning to a normal family dynamic.
Or maybe, if he didn't accept that, she was planning to give him one last warning before taking Se-young and running far away...
However, seeing her annoyed texts and emojis while she ignored the Slave Contract, Si-woo realized those worries were mostly groundless.
Because he knew from long experience that when his mom truly wanted to reject something or was being genuinely serious, she never used pouting emojis.