Dominating MIL

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Although Sujeong had never received formal training, she was gradually turning into a sex doll through her own efforts.

***

[MC POV]

The next day, I found myself standing in front of a building, hesitating to go inside.

Choi Han Group.

The name was displayed in massive letters across the front. The building was much bigger, wider, and taller than any of the others nearby. It stood out clearly, even from a distance.

"No wonder people use this place as a landmark."

In a city filled with buildings that all looked the same, this one stood apart. It was easy to recognize, which made it a common point of reference for people trying to find their way.

This enormous structure, almost like a lighthouse, felt completely out of place for someone like me. Yet here I was, standing at its entrance, about to walk in.

In my hand, I held a file folder. Yeonhee had left it behind and asked me to bring it to her. That's why I had come here.

'Knowing Yeonhee, there's no way she left this behind by accident… She probably did it on purpose. Maybe she was jealous that I went to see Yeonji last time.'

Back in university, I had sex with Yeonji, but I had never once been to Yeonhee's company.

The mindset for university and a corporate job had always felt completely different to me. So I had never expected to visit someone's workplace. And I definitely didn't think Yeonhee would lure me here like this.

'She really hasn't changed. Still a child inside.'

She was older than Yeonji but younger than me.

Yeonhee had always been more mature than others her age. The kind of woman younger girls looked up to. But beneath all that, she had the personality of someone always craving love and affection—a "Daddy" type, always starved for warmth.

Every night, I would have sex with my mother-in-law and Yeonji along with Yeonhee, but Yeonhee was still too shy to fully reveal herself in front of them. As a result, she often just acted normally around me, leaving her quite pent up.

If Yeonhee, who rarely ever made mistakes, had intentionally left the file folder behind just to call me here, it probably meant she wanted to spend some relaxed, quiet time alone with me after a long while.

Despite her mature appearance, she still had a childish side to her. If I didn't give her enough attention, she'd sometimes get upset. That was just how she was. So even though I had a pretty good idea of what she was up to, I came anyway—on purpose.

'It's nice to see Yeonhee again, but going in there is still a bit intimidating…'

I had been inside a few company buildings before during my time as a delivery driver, but this was my first time at the Choi Han Group.

"Haa… Let's just go in."

While I stood around hesitating, a few people started giving me suspicious glances. I finally gathered myself and stepped inside.

Everyone around me was dressed in suits. I was the only one in a plain T-shirt and jeans. Even though I was dressed casually, I felt completely out of place here.

Since I had to meet Yeonhee, I made my way to the front desk.

"Excuse me."

"Yes, how can I help you?"

"I'm here to deliver this document. Could you tell me how to get to Lee Yeonhee?"

"Lee Yeonhee? One moment, please…"

The front desk employee welcomed me with a kind smile and started searching on her computer. After a few moments, she looked back at me with a surprised expression.

"Um… As far as we know, there's only one Lee Yeonhee at headquarters. Are you sure you've come to the right person?"

"What? This should definitely be the right place…"

"Hmm… Is this the person you're looking for?"

She turned the monitor toward me. A clear photo of Yeonhee's face appeared on the screen.

"Ah! Yes, that's her."

"Um… May I ask what your relationship with her is?"

"Well… That's… kind of hard to explain."

In the past, I could have easily said she was my girlfriend's older sister. But things between us had become far more complicated than that.

'Master? Lover? Daddy? Yeah… none of those are going to work.'

All kinds of thoughts flashed through my head, but I chose the simplest answer for now.

"Uh… She's my girlfriend's older sister. She asked me to bring this file folder to her."

"Ah… I see…"

She nodded, but her expression clearly showed some doubt. Her eyes seemed skeptical, and one of her hands disappeared beneath the desk. For a second, I seriously considered whether I should make a run for it.

"I'll call and confirm. Please wait a moment."

"Sure…"

Still keeping one hand hidden, she made a call.

"Yes, hello. It's about a file folder. Your sister's boyfriend came to drop it off, and I just wanted to confirm… Yes… Okay. Got it."

She seemed slightly tense during the call, like she was talking to someone important. After hanging up, she carefully hid her surprise and looked at me again.

"Yes, it's been confirmed."

She removed her hand from beneath the desk and opened the entrance door for me. Luckily, I was finally allowed in without further issue.

That is, until someone else appeared.

"Hold on a minute."

A man who looked like security stepped in front of me. His expression was stern, and he blocked my path without saying anything more.

"Excuse me… Why are you stopping me?"

"No outsiders allowed. Go back."

The man was rude from the beginning, clearly hostile.

Even though we were meeting for the first time, he didn't bother to hide his irritation. It felt like I was being treated as an enemy, and frankly, I wasn't in the mood to tolerate it.

"Excuse me, his identity has already been verified. It's okay for him to enter," said the front desk employee.

"How do you know the person Yeonhee mentioned is really him? He could have just guessed correctly. Isn't it strange for a sister's boyfriend to come all this way just to deliver a file folder?"

To be fair, it was a little strange.

But she had already confirmed my identity by calling Yeonhee directly. So there was no reason for him to keep blocking me, especially not with that kind of attitude.

"How do we know he's not a stalker who stole the file folder?"

"Hey, that's going too far!"

I raised my voice. His absurd accusations and obvious hostility were way out of line.

As our argument started to draw attention, a familiar voice broke through the tension.

"What's going on here?"

"Yeonhee!"

She had come down herself because I hadn't shown up yet. She walked over, her expression a mix of concern and confusion.

"Um… well, it's just that…"

The security guard, clearly not expecting her to appear, began to stutter. If he had genuinely been doing his job, he wouldn't have looked so rattled. But since he had acted on impulse, he was flustered and unsure of what to say.

"What's happening?" she asked the front desk employee, who calmly explained everything.

Yeonhee quickly understood the situation.

"He's the one I asked to bring the file folder. There's no issue here."

"B-but, outsiders aren't allowed inside…"

Still trying to stand his ground, the security guard threw out another flimsy excuse.

"I vouch for him. I'll take full responsibility. Are you ready to take responsibility if you don't let him in? Can you afford to cover the value of that folder he's carrying?"

"W-well, I… I…"

He couldn't meet her eyes. Instead, he turned away and stepped aside to let me through.

I later found out that the security guard had secretly been in love with Yeonhee. His jealousy had led him to block me. But after this incident, he quietly left the company, and almost no one talked about it again.

Anyway, I finally made it into the building. As I walked toward Yeonhee's office, I realized again just how important her position really was.

Her department was labeled as the chairman's secretary's office, but in truth, she was doing work that should have been handled by my mother-in-law. Even most of the executives didn't dare interfere with her.

No wonder the front desk employee had been so nervous on the phone earlier.

"Thanks for bringing the file folder."

"Well, that's done now. I'll head back."

"Um… no one ever comes here, and I happen to have some free time…"

Yeonhee looked slightly flushed as she spoke.

It was probably her first time speaking to a man this way. Her words came out awkward, but her feelings were clear.

"Then I guess I should stay a little longer… with my daughter."

"Yes… Daddy♥"

Just moments ago, she had been speaking with confidence and authority in front of the much larger security guard. But the moment we were alone, she dropped that facade and revealed her true self with a soft smile.

"Come here."

"Daddy♥♥"

I called Yeonhee over and gently stroked her chin. She closed her eyes and leaned into my touch, clearly enjoying it.

It had been a while since she last called me "Daddy" and behaved like a daughter. She must have been holding back for some time because she quickly slipped into her daughter-like persona, acting sweet and affectionate.

"Sniff♥ Sniff♥… I love Daddy's scent♥"

"You smell it every day."

"But this is the first time I'm smelling it at the company♥"

She hugged me and acted cute. However, her cuteness involved rubbing her chest and legs against my body. Naturally, this made my dick grow and touch her belly.

"You got an erection looking at your daughter, Daddy♥"

"Yeah… my daughter is so sexy, it's hard for Daddy to hold back."

"Haa♥… Yes♥ It's because Yeonhee is bad♥… So, I need to be punished by Daddy a lot♥"

I slowly started to take out my dick while looking at Yeonhee, who was excited at the thought of being punished in company with a lewd smile.