Chapter 5

That day, after witnessing her son-in-law's masturbation, Lee Yeon-seo found herself drowning in worry. But there was no solution. No matter how much she agonized over it, the problem had no answer. The only real solution was for her to take care of it herself—nothing else would suffice.

"Haa... what should I do?"

Her concerns only deepened with each unanswered question. And so that night...

'No way... is he going to do it again today?'

Lee Yeon-seo pretended to sleep as she waited. For her son-in-law's nighttime ritual.

It must have been around one in the morning. With a soft rustle, she slowly rose from her bed and moved like a stealthy cat. Her destination: her son-in-law's room.

She crept forward slowly, silently, until she reached his door—and then she froze.

"!!!!!!!!!!!"

This couldn't be...!!! She could hear it. The sounds were coming from inside his room. Faint female moans drifting through the door, along with the unmistakable lines from a male actor.

It was happening again. Her son-in-law was clearly watching a video that involved a mother-in-law. Her heart began to pound wildly—thump thump thump—and before she knew it, a tingling sensation spread through her body.

But she knew she couldn't. So... she turned away. She endured it, covered her ears, closed her eyes. Yet the more she tried to block it out, the more vividly she imagined her son-in-law pleasuring himself. And then her own body, wrapped around him, offering comfort.

In the end...

"I couldn't sleep... not even for a second..."

She hadn't slept at all.

"Haa... this can't go on. I have to find some kind of solution."

If things continued like this, she feared she would be the one to cross the line first. "Kim Seobang is holding back by masturbating, but I..."

Her own desires were just as strong. After all, who did Seul-ah take after? Her, of course. That was why she could never hate her daughter. Because she had given birth to her.

But she couldn't masturbate either. What if her son-in-law caught her in the act? He would surely lose control and cross the line himself.

"Haa... for now, let's check again. See what he watched today."

Eventually, she headed back to his room under the pretense of cleaning while he was briefly out.

"The trash can... the tissues... Haa... it's so thick again..."

As expected, the trash can held clear evidence of her son-in-law's activities. And when she turned on his computer, the list of recently played videos confirmed everything.

Of course...

"All of them have 'mother-in-law' in the title..."

Every single video title included the words [Mother-in-Law]. This was undeniable proof that he had been imagining her again today while pleasuring himself.

"Is that... how badly you want it? Kim Seobang? With me?"

She didn't dislike the fact that he desired her so much he couldn't hold back. On the contrary, the knowledge that a man still wanted her at this age filled her with unexpected joy and excitement.

"Am I... still useful?"

It had been quite a while since she'd had sex. She'd almost forgotten how it felt. But now, knowing there was a man who craved her like this, the dormant desires within her began to slowly awaken.

‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠

The next day, and the day after that... Kim Seobang continued to masturbate while thinking of her every single night. Then, at some point during that week...

Drip—

'Oh my...?'

That night, as she secretly listened to him masturbating from outside his door like always, she felt the warm, slick fluid trickling between her own legs and couldn't hide her shock.

And right at that moment—!

"!!!!!!!"

The Korean words coming from inside his room. Her son-in-law, who usually watched Japanese or Western videos, had cried out for her in his own voice.

'He... he came while calling my name?'

At his desperate cry, Lee Yeon-seo turned away once more. She crawled into her own bed, pulled the covers over her head, and curled up like a shrimp.

The next day.

"I need to wash these..."

When Lee Yeon-seo opened her eyes and realized her panties were soaked through, she gathered the laundry and headed to the washing machine.

"Haa... Yeon-seo... what on earth are you doing..."

Even she thought her behavior was utterly shameful. Her young son-in-law had called out for her while masturbating, and she'd ended up doing the same? As the washing machine rumbled away, her self-reproach continued. With a deep sigh, her feet unconsciously carried her toward his room.

And so...

"What exactly did he watch yesterday?"

Unlike other times, he had cried out for her in his own voice. What kind of video could have made him lose control and call for her like that? Her curiosity overpowered her reason, guiding her hand to the computer. By now she could open the program naturally. The moment she checked the list—!

"Th-this is...?"

There were four titles in total.

Three of them were similar to the titles he'd watched over the past week, so they weren't surprising. But the last one was different from anything she'd seen before.

"Cumming on a sleeping mother-in-law?"

The title itself was intensely provocative. Something about it strongly stirred her instincts. Lee Yeon-seo felt certain that the answer she'd been searching for was inside this video. She clicked play.

What she saw was...

"She's... pretending to be asleep...?"

The actress was sleeping. The male actor pulled down her panties and penetrated her. At first, she really had been asleep. But as it happened more and more often, she began to notice the strange sensation upon waking. One day, she decided to pretend to be asleep instead. The result—

"Even though she knows her son-in-law is inside her and cumming in her womb... she keeps pretending to sleep?"

The video's content was shocking. If this scenario became reality, it could be the perfect solution she'd been looking for.

Her heart raced. Her body grew hot. Just imagining her son-in-law sliding into her sleeping pussy made her panties grow wet again.

"This is it... If we do this, Seobang won't have to suffer, and I can take Seul-ah's place. It would just be something that happened while I was asleep!!"

She'd found it. A way to perfectly replace her daughter without openly crossing the line. Now that she'd discovered the method, Lee Yeon-seo had to think carefully about how to put it into action.

The first issue was her son-in-law's resolve. Even if she was asleep, he wouldn't pounce on her. Just as she was trying to hold the line, he was doing everything he could to avoid crossing it.

'How can I make this happen?'

She needed to guide him so he could release his lust on her sleeping body. But how?

Having found her answer, Lee Yeon-seo began making various changes to encourage Kim Seobang to secretly cross the line. The first was her choice of loungewear around the house. She started wearing hot pants like young women, along with thin camisoles without a bra. Sometimes she would "accidentally" let him catch a glimpse of her breasts. Other times she would show off her panties under a short skirt.

But...

'Why... are you holding back, Kim Seobang?'

Even when she showed herself like that, he only masturbated more furiously. He never made a move on her. This was a problem. The dark circles under his eyes had grown heavy from masturbating too much. At this rate, it could seriously affect his health. It would be much healthier if he ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠could thrust into her properly and cum with satisfaction.

After showing herself off for days without any reaction, Lee Yeon-seo made up her mind. After Kim Seobang returned from exercising, they ate lunch together, and she casually began sharing a made-up memory.

"Kim Seobang."

"Yes?"

"Do you have any memorable stories or things like that?"

"Hmm... I'm not sure. There must be plenty, but nothing comes to mind right now..."

"Hehe, really? I have one."

"Oh? What is it? I'm curious."

"Hehe, well you see..."

And so Lee Yeon-seo's fabricated memory began.

"I've always slept a lot since I was little."

"You sleep a lot?"

"Yes. When I really sleep deeply, I can stay asleep for two whole days straight."

"Whoa... is that even possible?"

It was obviously a lie. Maybe someone in the world could do that, but it certainly wasn't her. Still, she created this false memory for one reason only—Kim Seobang.

"Back then, my mother thought I was dead."

"Wow..."

"No matter how much she tried to wake me, I ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠wouldn't get up. I was lying there like a corpse, so she came over in a panic!!"

"And then?"

"Hehe, she said I was snoring softly like nothing was wrong."

"No way! How can you sleep like that?"

"Isn't it amazing?"

When she saw that her son-in-law was completely absorbed in her made-up story with genuine fascination, she subtly slipped in her real purpose.

"I don't sleep quite that deeply anymore, but one thing hasn't changed."

"Huh? You still do? What is it?"

"I cherish my family so much."

"Yes, that's true."

"And I never go on trips alone."

"Right... as far as I know, you don't."

Even though her explanation was getting long, Kim Seobang didn't seem annoyed. Not only was her story interesting, but it had been a long time since she'd shared anything with such lively happiness. It made him feel warm inside.

"All of that comes from the same trait I had back then."

"Oh? What is it?"

"I don't know."

"Huh?"

"Once I fall asleep, I won't wake up no matter what anyone does to me."

"E-even if someone... carries you away...?"

Lee Yeon-seo noticed her son-in-law's eyes change the moment she said those words. She continued speaking.

"Yes. That's why having safe, trustworthy family around me is so important."

"How deep does it go...?"

"Well, once I'm out, you could sing right next to me or even pick me up and move me around, and I still wouldn't notice?"

"Wow..."

"Hehe, pretty dull, right?"

"Come on, they say beautiful women are always heavy sleepers."

"Hehe."

When her story ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠ended, both Kim Seobang and his mother-in-law seemed to have reached some kind of decision. Their eyes had changed.

And that night.

Creeeeak—

The sleeping mother-in-law. Lee Yeon-seo's bedroom door slowly began to open.

Step... step....