A Special Study Session

A few days later, Jin-yeong finished his final exams and the semester break began. On the very first day of vacation he enrolled at a driving school near the neighborhood, determined to walk out with a license. Among college freshmen it was practically a shared rite of passage — cramming for a driver's license over that first long break — and the academy was packed wall to wall with kids who'd just turned twenty.

A notification chimed on my phone. A message from Jin-yeong. Our family kept a group chat where we shared the little details of our days.

That evening, I sat in my office and stared at the monitor. The staff had already gone home an hour or two before. After a simple dinner I decided to steal a look at Suyeon and Jin-yeong's night.

I had told my wife I had a meeting, but the client had postponed on their end, and my evening had opened up out of nowhere. I barely hesitated before deciding how to spend the unexpected hours: watching Suyeon and Jin-yeong's affair unfold.

In the kitchen, Suyeon and Jin-yeong sat across from each other at the dining table, working through a booklet of practice questions for the written driving exam.

"Alright, next one. Listen carefully, Jin-yeong. If your vehicle breaks down while crossing a railroad crossing and you can no longer drive it, which of the following is not a correct action for the driver to take?"

"Hmm. Give me the choices, Mom."

"Okay. One: turn on the hazard lights. Two: notify a railroad official. Three: check the cause of the vehicle malfunction. Four: evacuate any passengers."

"Wow, that's harder than I expected."

"Think it through. If you look at it like common sense, you should be able to figure it out."

"Hmm... three?"

"Wow, that's right. Getting it without even peeking — that's impressive."

"Hehe. I looked a few things up online too. Like you said, a lot of these are just common-sense questions."

"Exactly. If you sort the right answers from the wrong ones that way, you'll be fine."

"Got it. I've got the method down, at least. And now I'm starting to get hungry."

A moment later Jin-yeong announced he was hungry, stood up, and came around the table to sit beside Suyeon.

"What's this? You said you were hungry, so why are you coming over here to sit next to Mom, Mr. Jin-yeong?"

"Uh... I am hungry... just not that kind of hungry... hahahaha."

"Again? Hoho. Men really do have only one thing in their heads..."

"Mom, that only works if the other person is attractive. If there's no chemistry, it doesn't matter how badly you want it."

"So you're saying Mom is attractive, then? Then why are you looking at me with those greasy eyes?"

"Mom, if there's something delicious sitting right in front of you, your mouth waters, doesn't it? That's all this is. Male instinct."

"Honestly, the things that come out of your mouth..."

A moment later Suyeon and Jin-yeong leaned in as if it were the most natural thing in the world, and their lips met in a slow, soft kiss. She was wearing a white cotton tee, the faint outline of a black bra visible beneath it, and Jin-yeong's hands went to her breasts as though they belonged there. He lingered a moment, feeling the shape of them through the fabric, and then his hands slipped inside her clothes.

Suyeon felt his touch and, so as not to get in his way, gently lifted the hem of her shirt to make it easier for him.

"Mmm..."

A low moan slipped from her throat. Suyeon, making that sound under someone else's hands — not mine — had her eyes quietly closed, savoring every stroke. Watching them, I felt myself beginning to stir.

Except for when that kid was nursing as a baby, Suyeon's breasts are mine...

That was how it had been. Not long after Jin-yeong was born, while he was happily latched onto Suyeon's nipple and drinking her milk, I had said those words. I never imagined a conversation from twenty years ago would become reality. And yet here it was.

I let the memory fade and turned my attention back to the filthy, beautiful scene unfolding on the monitor. Jin-yeong was kissing her ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠deeply, his hands on her bare breasts.

"Mmm..."

Through the fabric of her bra he rolled her nipple between two fingers, slow and gentle, winding her tighter.

"Ah— hey... Jin-yeong... where did you learn to do that..."

"I didn't learn it. Must be instinct. My hands just go there on their own."

"Hah... the nipples. That's a woman's sweet spot..."

A light flush of arousal had already taken her. Suyeon tipped her head back toward the ceiling, eyes closed. In the next instant Jin-yeong's head disappeared beneath her cotton tee. He tugged the bra down and brought his mouth to the breast that spilled free.

"Hah— Jin-yeong, what are you doing..."

Her hands came up and gently cradled the back of his neck. His lips had claimed one nipple; his other ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠hand worked the remaining one with a rougher, hungrier touch. Suyeon looked half out of her mind with it.

"Ah... that's good..."

Watching them, I noticed something interesting. For all the heat in their touching, neither Suyeon nor Jin-yeong had taken anything off. They were doing all of this still fully dressed. He could have stripped her and gone at her without restraint — and yet they didn't, as if some part of them was still accounting for the chance that someone might walk in. The way they held reason and instinct in the same breath struck me as almost impressive.

A moment later Suyeon took the hem of her tee in both hands and pulled it up to her shoulders. The sight that had been hidden inside the shirt was laid bare: Jin-yeong, driven by nothing but appetite, had dragged her black bra down and was greedily sucking at her right nipple, his right hand toying relentlessly with the left.

"Ah... haah..."

He stayed like that for a long time, mouth working at her breast, before the motion finally stilled and he drew his lips away. His mouth was wet and shining, the lips themselves looking thicker, swollen with want.

"We're supposed to be studying... what's so good about Mom, huh..."

"This is how it actually sticks in my head."

Jin-yeong gathered her against him with practiced ease and guided her head down toward his lower belly. Suyeon already knew what to do. She hooked his trunks and underwear together and pulled them down past his knees in one motion.

"Hhhk—!"

A short, broken sound tore out of him. Suyeon's soft, full lips closed around his cock and took him in, slow and deep.

She sucked him hard one moment and licked him with a languid, teasing patience the next, building the heat by degrees. She held him buried in her throat without moving, eyes closed — then slowly opened them and looked up at him.

Jin-yeong, lost in the feel of her mouth, had both hands resting on her head as she eased it gently back and forth. Their eyes met, and Suyeon gave him a small, smiling glance that was nothing but love.

The look was more than he could take. His grip tightened and he pulled her head down hard onto his cock.

"Ghk— ghk— ahhk..."

With him lodged deep in her throat she couldn't breathe, and the wet, filthy sounds that spilled from her mouth were almost obscene. She patted lightly at his thighs with both hands.

"Ahh— Mom... I'm gonna..."

A thick, pulsing flood of cum poured into Suyeon's mouth. Some of it must have gone straight down her throat. She kept her eyes closed, savoring the feeling of him filling her.

When the last of it was spent, Jin-yeong slowly drew himself out. Suyeon's mouth was swollen and still closed. A thin thread of cum slipped from the corner of her full lips.

"Nngh..."

I came too, right along with them. I was peeping on someone else's sex — and the someone else was my wife and my son. The rush that kind of transgression gave me was, without exaggeration, the strongest high there was. I tore off a few tissues, wiped myself clean, and let the heavy, languid afterglow settle through me.

When I looked back at the monitor, Suyeon's throat bobbed once as she swallowed everything still in her mouth. Taking Jin-yeong's cum like that had already become the most natural thing in the world. Something about it being the person you love, she'd said. That it tasted good.

"There. Satisfied? Our Mr. Jin-yeong's always tastes good, no matter when I have it. Hoho."

"Ah... Mom... that was amazing... I think I'll pass the written exam on the first try thanks ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠to you."

"Pfft. What an excuse... I only do this at home, you know. And only because you're so cute."

She leaned in and pressed a quick kiss to his cheek. Jin-yeong stood, tugged his pants back up from around his knees, and sat down again.

And that was how the mother-and-son oral session — sandwiched into a night of studying for the written driving exam — came to an end.