While Jinwoo was vigorously rubbing his erection against his mom, causing their excitement to intensify, he felt the gaze of his sister Sohee directed towards him and his mother.
Sohee, initially distant from Jinwoo and his mother, seemed to have been pushed closer to them over time by the crowd.
Initially, Sohee was absorbed in her smartphone screen and was not paying attention to the actions of Jinwoo and their mother.
However, upon hearing the notification sounds of the messages being exchanged between Jinwoo and their mother, she glanced over briefly and then saw them closely embraced.
Although it was not certain, an unusual warmth seemed to be rising softly between Jinwoo and his mother.
* * *
Jinwoo felt Sohee's gaze and stealthily glanced at her.
Then, their eyes met, and feeling a pang of embarrassment, he quickly averted his gaze.
While he and his mother were feeling each other's bodies and growing excited, the embarrassment rushed over him as if he had been caught masturbating when he made eye contact with Sohee.
However, there were about two or three people standing between Sohee and Jinwoo, layered like a wall, and thanks to that, it was difficult to see what each was doing below the shoulders.
In a crowded subway, such jostling and contact could easily be dismissed as accidental due to the crowd.
Jinwoo thought that just by standing behind his mother, the lewd act with his mother wouldn't have been caught by Sohee.
Jinwoo lifted his head and looked at Sohee again.
She was still watching him and his mother with a suspicious gaze.
Deliberately, Jinwoo grasped his mother's firm ass with his whole palm, squeezing it tightly.
He could feel his mother startle and flinch with her head bowed.
Seeing Sohee's eyes and being suspected by her while sexually molesting his mother made Jinwoo feel an intense thrill of excitement, adding to the embarrassment he had just felt.
* * *
His mother was wearing an oversized white round-neck sweater, and Jinwoo slightly moved back to create some space between them before slipping his hand under the bottom of her sweater at her waist.
Jinwoo felt the touch of his mother's bare skin on his hand.
After feeling the strap of her bra, Jinwoo, with a skill uncharacteristic of a high schooler, deftly unhooked her bra with one hand.
-This must be the result of the autonomous advanced learning he did with Daeho-With a snap, the bra hook came undone and loosened. His mother, surprised, quickly pressed her arms to her sides to catch the straps so they wouldn't slide down the front.
Minji, who was holding her mother's hand, turned around in surprise due to her mother's sudden movement.
Fortunately, the people standing nearby blocked Minji's view, so she couldn't see what Jinwoo, standing behind, was doing.
His mother, awkwardly bending her back, was passively accepting her son's sexual abuse in a public place without much resistance.
On the fine skin of her back, Jinwoo slowly began to trace letters with his finger.
-Using the method they had practiced the previous night-
'Hae'
'mi''
Calling his mother by her name in an informal speech.
As her name was being inscribed on her back by her own son, she tightly closed her eyes and let out a deep sigh.
Jinwoo's message continued to be written on her back.
'Tonight'
'With me'
'Let's have sex'
With each stroke, as if feeling it, his mother slightly trembled.
As Jinwoo finished writing his last message, she opened her eyes, looking dazed, and quietly exhaled as if she was breathing in disbelief.
* * *
The train carrying Jinwoo and his family soon arrived at the station near their home.
A few stations earlier, the train had begun to empty, and Jinwoo had already detached himself from his mother and was using his cardigan to cover his visibly enlarged cock.
When the train reached their destination and the doors opened, his mother immediately let go of Minji's hand and said she needed to go to the bathroom.
She started running towards the restroom in a hunched posture, pressing her arms against her sides to hold her bra straps.
-To fix her thoroughly soaked bra which hooks had come undone-
Jinwoo watched his mother with a satisfied expression.
Shortly thereafter, Sohee approached Jinwoo, flicked his head with the tip of her finger without saying a word, and walked past him.
* * *
After fixing her bra and clothes, which Jinwoo had undone and disheveled, his mother came out of the bathroom.
In response to Sohee and Minji's concerned questions asking if she was okay, she simply smiled calmly and said she was fine, remaining mostly silent on the way home.
* * *
Leaving the station and heading home,
the mother led the way while Sohee and Minji cautiously followed behind, gauging her mood.
Jinwoo trailed behind them all.
Jinwoo was concerned about his mother's demeanor.
His mother had become silent after Jinwoo's mischievous sexual pranks.
This seemed to be the first time she did not actively try to act like her usual self in front of the family after Jinwoo's misconduct.
The harassment and teasing by her son had started a few days ago and had increasingly crossed the line.
It was possible that her dissatisfaction had built up to the point where she was truly angry for the first time.
* * *
Walking from the station to their home, the mother walked ahead while Sohee and Minji cautiously followed her, keeping an eye on her mood. Jinwoo, walking behind, sent a worried text to his mother: "Mom, are you angry?"
As the notification sound chimed on his mother's smartphone, she looked at her phone and seemed to ponder for a moment while walking. Then, as she typed a message, the notification sound chimed on Jinwoo's phone: "I don't know."
In the chat window appeared his mother's response.
"Did it upset you when I unhooked your bra and called out your name like that?"
Jinwoo sent another message.
"I said I don't know!"
After a pause, his mother's reply came back, with a hint of annoyance and irritation in her text.
"By the way, a lot of people wear that necklace just for fashion, haha."
Trying to lighten his mother's mood, Jinwoo joked and tried to explain away his earlier actions.
"Really! You think I don't have that much common sense?"
His mother replied, somewhat incredulously, as if it was absurd to be teased by her young son.
"Mom, but are you really not angry?"
Jinwoo wanted to know what his mother truly felt.
It seemed comforting for Jinwoo to confirm that such conversations with his mother were possible.
The mother walked ahead, appearing to think deeply again. Then, after a while, she wrote a lengthy message and soon sent it: "Sigh~ Where on earth did such a weird son come from!! Tormenting your mom like this?! I should be angry with you right now, Jinwoo, but the problem is I'm not even angry!! I'm going crazy, so please stop asking!!! -_-^"
Her true feelings revealed, the message ended with an emoticon that seemed annoyed.
"Hehe, then I guess I succeeded?"
Jinwoo playfully sent a message back to his mother.
Although he sent the text as a joke, Jinwoo was delighted to read his mother's response. Now, she didn't just feel like his mother but also like a girlfriend who took him seriously, which made her seem very lovely to him.
"What are you talking about? Ha... really... Sohee and Minji are watching, so we'll talk later."
Even though his mother responded as if she was exasperated, she seemed conscious of Sohee and Minji, wanting to end the conversation.
Looking up, Jinwoo saw that Sohee and Minji were alternately glancing at their mother and Jinwoo, sensing the awkwardness from the continuous notification sounds between the mother and Jinwoo.
* * *
"Mom, how about we grab some ice cream from the convenience store as a treat? If you give me the card, I'll go buy it."
Feeling awkward under the gaze of his sister and Minji, Jinwoo approached his mother and spoke casually.
"Should we do that? Jinwoo, will you go get it?"
His mother, trying to act normal again, smiled and responded to Jinwoo.
Minji requested Crunky Choco Mint ice cream.
Sohee said she'd eat whatever Jinwoo picked for her.
"And for Mom?"
Finally, Jinwoo asked his mother.
"Get me the Vanilla."
Handing over the card with a coy reply, his mother briefly answered.
Jinwoo quickly ran to the nearby convenience store.
He chose Crunky Choco Mint, two GooGoo Cones, and Vanilla flavor Bbongbar from the ice cream freezer.
Then, he went to the display of household items and picked up a large-sized condom packet.
While paying with the card and keeping the receipt, Jinwoo slipped the condom into his cardigan pocket and put the ice creams in a plastic bag.
Then, he hurried back to where his mother, Sohee, and Minji were waiting.
"Mom, can you check if the receipt is correct?"
Handing his mother the card and receipt, Jinwoo was slightly out of breath.
The moment she saw the large-sized condom on the convenience store receipt, his mother's face flushed.
Jinwoo distributed the ice creams to Sohee and Minji and handed the vanilla Bbongbar to his mother.
With trembling hands, his mother took the ice cream Jinwoo handed her, then turned around and started walking towards home, silently and awkwardly again.