I Fucked My Mother-in-Law to Marry My Girlfriend

"Most of the rooms are empty… They're usually used when guests visit or when the staff can't go home."

"O-oh… I see…"

*Tap tap tap tap tap tap*

It would take about an hour to tour the entire mansion. The house itself was massive, and the garden was overwhelmingly large, making the tour even longer.

*'I-I can't focus on the explanation.'*

There were so many rooms, and the layout was so complex that it was hard to memorize everything just by listening. Even if I were fully concentrating, it would be difficult to remember it all. But now, with my mother-in-law giving me a handjob, focusing was nearly impossible.

*Tap tap tap tap tap tap*

"Oh my♥ Are you uncomfortable somewhere?"

"W-well, my… ugh… my dick…"

My mother-in-law asked innocently, as if she had no idea what was happening, but her hand was moving a little faster now. I could barely speak, twitching from the pleasure.

"Hehehe♥… It's embarrassing for me too, walking around with my chest exposed like this♥"

I wanted to resist and tell her to stop, but the sight of her large breasts and stiff nipples paralyzed my reason. She looked youthful enough to pass for an older sister, and her body was enough to drive any man wild. And here she was, holding my dick and giving me a handjob. I couldn't bring myself to say, "Please stop."

*'She's deliberately keeping me on edge…'*

Despite claiming to have only one experience, whether it was natural talent or not, my mother-in-law had an uncanny ability to gauge my limits. She was giving me a handjob that was just enough to keep me close to the edge but not enough to let me finish. I was completely at her mercy, following her pace as she continued her explanations.

*'She's excited too…'*

Her nipples were stiffly erect, larger than cherries, and impossible to ignore.

"You seem to like my breasts♥"

"W-well… yes."

As my gaze lingered on her chest, she deliberately pushed her breasts forward, as if to show them off more. She was clearly enjoying my attention.

"Maybe it's because I use my nipples when I masturbate… they've grown bigger than others… even bigger than my daughter's♥"

"Ugh?!"

She knew exactly how to excite a man. By comparing herself to Yeonji, she was deliberately stirring a sense of depravity within me.

"Then I'll continue the tour… in a good mood♥"

The tour of the mansion continued, but with her constantly stroking my dick, I couldn't focus on anything. Even though she assured me no one was around, being out in the open with my dick exposed was both embarrassing and thrilling. My erection showed no signs of subsiding.

After about 30 minutes, we finished touring the first floor.

"Now, let's go up to the second floor."

"But Yeonji and Yeonhee are on the second floor…"

"It's okay♥… They're behind closed doors."

The mansion had two floors, and the tour would be over once we finished the second floor. But I hesitated, knowing my girlfriend and the secretary were upstairs.

"Come on… it's okay♥"

*Swish… tap tap tap tap tap tap*

"Ugh!? M-Mother-in-law?!"

"If you agree to go up to the second floor, I'll make you feel even better♥"

*Tap tap tap tap tap tap*

Her hand sped up slightly, sending waves of pleasure through my body. But she still held me just shy of climax.

*'Ugh… I have to… hold it in…'*

Going up to the second floor was risky. My heart was already pounding from walking around the first floor in this state. The thought of being caught on the second floor, where the risk was even higher, made me hesitate.

But…

*'I-It's not enough!… I want to cum… ugh!'*

My dick, stimulated for 30 minutes straight, was swollen and throbbing, desperate for release. But the final push was just out of reach.

*Tap tap tap tap tap tap*

"Come on, let's have a nice 'brrrrt brrrrt' here and go up to the second floor♥"

She tempted me with a lewd smile, luring me into even greater depravity.

"I-I'll go!"

"Good… then♥ Haaah♥"

"Ugh!?"

*Brrrrt brrrrt brrrrt brrrrt*

In the end, I succumbed to temptation. My mother-in-law, satisfied with my answer, smiled and immediately took my dick into her mouth, sucking it hard.

*'M-My legs are giving out…'*

The intense pleasure nearly made me collapse, but I managed to stay upright. When I looked down, I saw her drinking every drop of my cum.

"Gulp♥ Gulp♥ Gulp♥ Gulp♥"

I had already ejaculated a lot, but she kept drinking it all.

*Drip*

A drop of semen dripped from the corner of her mouth, making her look even more provocative.

"Slurp♥… Gulp♥"

"Ugh!"

She sucked on my dick as if trying to drain every last drop, her cheeks hollowing with the effort.

"Haa♥… That was delicious♥ Lick♥"

She licked the semen from the corner of her mouth, her lewd expression making my dick twitch back to life.

"Oh my… I didn't think I'd be able to give you a handjob on the second floor… This is beyond my imagination♥"

She had assumed I wouldn't be able to get hard again so soon, but my libido proved her wrong.

*'Even when I'm with Yeonji… I usually masturbate three times beforehand…'*

On days I met Yeonji, I'd masturbate multiple times to curb my high libido. Even after pseudo-sex with her, I'd still need to relieve myself once or twice more. Two or three ejaculations weren't enough for me.

"Then let's go up quickly♥"

With a lewd smile, she led me to the second floor, my dick still erect and exposed.

The second floor had a central hall and a square-shaped layout, much like the first floor.

"Let's go."

"Ugh… yes."

*Tap tap tap tap*

She held my re-erected dick as we walked down the hallway, explaining the various rooms.

*'Yeonji is on this floor… ugh…'*

If she caught us, Yeonji might despise me and call off the wedding. But the thrill of the situation and the sight of my mother-in-law's jiggling breasts were too much for my reason to handle.

*'They're jiggling so much… more than Yeonji's!!'*

I'd seen Yeonji's breasts jiggle after pseudo-sex, but my mother-in-law's were even more pronounced. With every step, they swayed temptingly, making it hard to resist grabbing them.

*'Am I really my mother-in-law's… master?'*

Her demand that I become her master to marry Yeonji was still hard to comprehend. But the fact that this voluptuous woman walking beside me was my slave only fueled my arousal.

"We're almost at Yeonji's room."

*Twitch*

At the mention of Yeonji's room, my heart raced. She was in her room working on a university assignment. If we just passed by quietly, we wouldn't get caught. But if we did…

*'I'd never see her again…'*

The thought terrified me, but my mother-in-law showed no signs of stopping.

"Oh my… for some reason, the door is open today♥"

"Huh?! Th-then let's stop for a sec…"

"Don't worry♥"

*Squeeze*

"Ugh!?"

"If you stay quiet, I'll take care of it♥"

Among the many rooms in the hallway, one door was slightly ajar. My heart pounded at the thought of Yeonji catching us, but my mother-in-law remained calm. She tucked her breasts back into her dress and continued stroking me as we approached Yeonji's room.

*Knock knock knock*

"Yeonji~"

*'M-Mother-in-law!?'*

Instead of sneaking past, she boldly called out to Yeonji.

"Ah! Mom… where's Oppa?"

I stood next to the door, out of Yeonji's sight, but I could hear her voice.

*Tap tap tap tap tap tap tap*

"I was just giving him a tour of the second floor, and he said he was going to the bathroom, so I'm waiting for him."

"Really?… Tch… I was going to give him the tour."

My mother-in-law continued talking to Yeonji, her hand never stopping.

*Tap tap tap tap*

*'C-Crazy!?'*

She was giving me a handjob while casually chatting with her daughter. If Yeonji even peeked out the door, she'd catch us.

*'Ugh… the s-sound?!'*

Her hand moved skillfully, making almost no noise, but the pleasure nearly made me moan.

"I'll let Joohyun stay in the room next to mine, and when you two get to know each other better, I'll let you share a room."

"Really!? Thanks, Mom."

Yeonji hugged my mother-in-law, her arm briefly coming into view.

*'Ugh!! N-Now… huh?'*

Just as I was about to cum from the depravity, my mother-in-law stopped.

"Then work hard on your assignment."

"Okay~ I got it, Mom."

After finishing the conversation, she calmly closed the door.

"Oh my… you look like something's missing♥"

Her expression shifted from motherly to lewd as she squatted in front of her daughter's door, looking up at me.

"Come on♥… I'll fill what's missing here with my pussy♥"

She opened her mouth wide, stuck out her tongue, and pulled me back into the pit of temptation.