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

I couldn't fully process what I had just heard. All I could do was stare blankly at my mother-in-law.

"Hehe."

She simply smiled, sipping her tea leisurely, as if she hadn't just said something utterly absurd.

"S-so… what exactly do you mean by that?" I stammered.

"It's exactly as I said. If you want to marry my daughter, you must train me."

'I must be going crazy…'

My mother-in-law was telling me that if I wanted to marry Yeonji, I had to train her. I'd heard lines like, "Over my dead body will I allow this marriage!" in cheesy morning dramas, but never something as bizarre as, "If you want to marry my daughter, you must train me, her mother."

This absurd situation made even the most over-the-top dramas seem tame in comparison. My head was spinning.

"W-why…?" I managed to ask, struggling to keep my composure.

"I see… It was too sudden, wasn't it?" she replied calmly.

"Yes… Honestly, I still don't understand what I just heard."

It would be insane to immediately respond with, "Yes, Mother-in-law! I'll train you right away!" My reaction was the only sane one in this scenario.

'No, actually, has anyone ever experienced something like this? I don't even know what's normal anymore.'

In this utterly abnormal situation, I couldn't even tell if my own words made sense. I sat quietly, waiting for her to continue.

"My husband… Yeonji's father, was my master."

"M-master…? I-I see…"

My head was spinning again, but I tried to stay focused as she revealed her family's secret with unsettling nonchalance.

"Others might dismiss it as youthful passion, but my husband and I truly loved each other with all our hearts."

A small, nostalgic smile played on her lips as she reminisced.

"Ours was a relationship of master and slave, built on genuine care and affection."

'No way!! How am I supposed to focus now?!'

What had started as a seemingly normal love story had suddenly taken a turn straight out of an 18+ comic. My mind was reeling.

"When I was pregnant with Yeonji, my husband passed away. Along with my father-in-law…"

"Ah… Could it be that incident…?"

It was a tragedy that had shaken the entire country—one I was familiar with. The plane crash that claimed the lives of the chairman of Choi Han Group and his successor. The cause was attributed to sudden turbulence, a stroke of terrible luck.

"With their deaths, I inherited a vast fortune and company shares, so raising Yeonji wasn't a problem… but the biggest issue was me."

Her eyes grew sad as she forced a smile.

"My body, already trained by my master, couldn't go a single day without… relief. I had become a hopeless masochist."

"I-I see…"

I had no idea how to respond. All I could do was nod awkwardly.

"My husband… my master, is gone, but his orders are absolute for me. I will not sleep with any other man, nor will I take another master. I've kept this vow until now."

Their relationship was truly that of master and slave—a dynamic difficult for most to comprehend. Yet, I could tell her devotion was genuine.

"Three months before his death, he joked… but you must remember, my master's orders are absolute, right?"

"Ah… Yes…"

"He looked at my pregnant belly and said, 'If I die, make my son-in-law your new master.'"

'This guy was pretty out there.'

Though he'd said it in jest, it was essentially permission for her to take her son-in-law as her new master. Of course, he hadn't expected to die so soon, and my mother-in-law had likely taken it as a joke at the time…

"I've been holding back for the past year… waiting for a new master to appear♥"

Her gaze shifted, and the way she looked at me changed. Just moments ago, she had been regarding me as her future son-in-law…

'Gulp… Something about this is… intoxicating.'

Now, she was looking at me as if I were something above her—a look so full of allure that it was impossible not to feel a stir of excitement.

"I've held back for 20 years for Yeonji's sake… I didn't even consider my husband's playful words until now… but…"

She rose from her seat and knelt beside me—not on the sofa, but on the floor.

"M-Mother-in-law, w-wait, what are you doing!?"

I tried to stop her, but she was quicker. Her hand found its way to my crotch.

"When I learned you were Yeonji's boyfriend and that you sincerely wanted to marry her, I remembered my 'former master's' playful order."

Looking down at her slightly flushed face, I couldn't help but notice her ample chest.

'M-maybe even bigger than Yeonji's… gulp…'

Her breasts were so large that the dress she wore barely contained them. On an average woman, the chest area would have been loose, but on her, it clung tightly, accentuating her figure.

"I've suppressed my instincts for over 20 years, but since you appeared, the desires I've barely kept at bay have begun to awaken♥"

"Ugh!… M-Mother-in-law…"

Despite my attempts to resist, her seductive demeanor and touch were overwhelming.

"The one I will serve as my master♥… The one who will unleash all the instincts I've suppressed until now… my dominator♥"

The elegant, refined woman I knew now exuded the aura of a temptress.

"It seems you don't dislike me either, Juhyun♥"

"T-this is just a physiological reaction… Ugh!"

I tried to explain away my erection, but my words turned into a moan as her touch grew more insistent.

'S-she's so skilled! Much more than Yeonji… Ugh!'

I felt guilty comparing her to Yeonji, but my mother-in-law's experience was on another level.

"You seem to be struggling♥…"

Ziiiiiip

"Ah… M-Mother-in-law…"

"It's… impressive♥"

Her excitement was palpable as she unzipped my pants and freed my erection—the penis of the man who would soon be her son-in-law.

"I hate to say it, but… it's so much bigger than my late husband's♥"

She gazed at my 22cm length with a blissful smile, torn between loyalty to her former master and the thrill of serving a new one.

"It got this big because of me, right?♥"

"W-well…"

"Was it the dress I wore to show off my breasts? Or the panties I subtly revealed to you?♥"

'O-on purpose…?'

Her intentions had been clear from the start. She had dressed to seduce.

"Or… was it these?"

Swoosh

"Gasp!!!"

I nearly cheered aloud, covering my mouth with my hand.

'C-crazy!? She wore that in front of her son-in-law!?'

She squatted slightly apart from me, legs spread wide. The mesh panties she wore left nothing to the imagination.

'A completely bare… and it's… wet!?'

I couldn't tear my eyes away from her glistening pussy, staring in disbelief.

"Hehehe♥ How is it? My. Pu.ssy."

Swoosh

"M-Mother-in-law… i-if you do this… gulp!"

Noticing my reaction, she leaned forward, deliberately pushing her pussy toward me.

"Haaah♥ It's been so long since I've posed like this in front of a man♥"

Her excitement was evident as she revealed her most private parts after decades of chastity.

'I-it's getting wetter!!'

Her arousal only grew as she displayed herself, and my erection throbbed in response.

"Haa♥… I've been enjoying myself alone with the new master I'll serve from now on♥"

Every word she spoke stoked my primal instincts. The idea of becoming her master awakened desires I had long suppressed.

'N-no! I have Yeonji! How can I train my mother-in-law!? This is impossible!'

I tried to escape this surreal situation, but my body betrayed me. As her soft hand wrapped around my penis, I was consumed by a thrilling sense of forbidden excitement.

"Hehehe♥ It seems your penis likes my pussy♥… It's so impressively big♥… Hooo~"

"Ugh!?"

Her breath against me sent shivers through my body.

"You haven't… been with my daughter yet, have you?"

"Huh!? H-how did you…"

"Yeonji tells me everything… Don't worry. No one else knows."

She was aware of our lack of intimacy, as Yeonji had confided in her about our relationship.

"Even though it's so impressive, you've yet to truly know a woman… Poor thing♥ kiss"

"Haa… Haa… M-Mother-in-law…"

She kissed the tip of my penis with a tenderness that left me speechless. There was no trace of disgust on her face, despite the circumstances.

"I'll teach you about women… about females♥… So, please take your time and savor me♥ Haaah♥"

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

Before I could protest, she leaned in with a seductive smile and took me into her mouth.