My Friend's Mom's Yoga Class
Schlorp! My cock pulled free of Auntie's mouth with a wet, obscene sound.
"Haa… haa…"
Having swallowed every last drop of my cum, Auntie collapsed right where she was, gasping for air. That irresistible body of hers glistened with sweat, strands of hair plastered to her skin, making her look even more lewd and intoxicating.
Watching her, I felt my reason slowly start to return.
…Did I go too far?
I'd gotten so worked up I'd completely lost control. The image of myself ramming my cock down her throat like some animal flashed through my mind, and the thought that I might have hurt her drained the color from my face.
"Ah— Auntie? Are you okay…?"
"Sejin, you…"
Still dazed, Auntie finally managed to focus her eyes and shot me a sideways look. There was a hint of a pout in her gaze, but no real anger—and I let out a breath of pure relief.
The real problem, though, was something else entirely.
I glanced around. The floor under the table was a complete disaster of the juices and sweat we'd spilled. The air itself reeked of the filthy, mingled scent of our bodies.
We had to clean every last trace of this before Jinsu finished washing his hair and came out of the bathroom.
"I—I'm sorry, Auntie…"
"Sejin. Why don't we start by cleaning up the kitchen?"
"Y-yes, ma'am…"
Face burning red, I immediately set to work wiping up the mess of juices and cum from the floor with a towel.
From that day on, my everyday life changed completely.
Going over to hang out at a close friend's place was nothing unusual, so I could keep meeting Auntie in secret without raising a single suspicion. Whenever Jinsu wasn't looking, we'd share deep, tongue-tangling kisses, or sneakily fondle and suck each other off.
Thanks to that, every day felt fun now. Even the classes that used to bore me to death flew by the moment I started daydreaming about the filthy things Auntie and I did together.
"Hey. Jeong Sejin!"
Break time.
I was heading back to the classroom with a cheap piece of bread from the snack shop when Jinsu called out to me.
"Wanna come over for dinner at my place tonight?"
"Huh? For real? I can come?"
"Yeah. Mom said to bring you along. Let's just eat together."
My heart started pounding at those words.
I answered in the most casual voice I could manage.
"Then yeah, I'm down."
An invitation like that was more than welcome on my end, too.
I headed back to the classroom lost in fantasies of another happy evening with Auntie at Jinsu's place—only to freeze in shock. Someone I never expected was standing inside.
"…Ah?"
That teacher is in our classroom?
I stared at the bespectacled woman standing in front of the blackboard and let out a silent sigh.
Ugh. I really don't want to run into her.
Click. Click.
Spotting me, the teacher clicked her heels across the floor and came straight toward me.

"Where on earth have you been? Showing up this late?"
She fixed me with a blunt stare from behind her intellectual glasses as she spoke.
Her long, straight hair was pulled up into a single, flawlessly neat bun. A crisp white dress shirt, a perfectly pressed formal skirt—everything about her appearance screamed the strict, prideful personality she was famous for.
Of course, no male student would ever dislike a teacher that beautiful. No matter how high-strung her temper was, she still ranked number one among the guys as the homeroom teacher they most wanted to get. Not that any of them would ever say that in front of me.
Because the woman standing right in front of me was…
"Um. Mother…"
…my stepmother.
We were family on paper, sure, but ever since Dad died we'd been little more than strangers. Even at our cram school she was known for her short fuse—and when she dealt with me, her tone always got a little sharper.
After Dad passed, she started treating me like I didn't even exist at home.
Some kids said they were jealous that someone that pretty was my mother.
They had no idea what they were talking about.
Yes, my stepmother was young and gorgeous—but so what? At the end of the day we were basically strangers. And her personality? The chill coming off her was arctic. There wasn't a scrap of affection in the way she spoke to me.
"I told you to call me Teacher while we're at the academy."
Her tone was cold and businesslike.
Only then did it sink in that we were at the cram school. I nodded.
"Yes, Teacher… What is it?"
"What is this mock exam score of yours supposed to be? Are you joking right now?"
Here it comes.
For the record, my score this time had dropped a little from the last one. Naturally, it fell far short of my stepmother-slash-teacher's standards. Report cards weren't out yet, but she must have already heard my results from the other instructors.
"I-I'm sorry… Teacher."
"Are you going to start studying properly or not? Hm?"
As she spoke, she tapped the tip of her shoe against my leg. Other students were right there, but she didn't care in the slightest—prodding me with her heel like she wanted to humiliate me in front of everyone.
My stepmother finding some excuse to chew me out was nothing new. Sometimes the reasons were so ridiculous I wondered if she was picking fights on purpose.
But why come all the way to the classroom for this?
Was she just dumping work stress on me?
I had no choice but to bow my head.
"I'm sorry. I'll do better on the next finals."
"And I'm supposed to believe that? I also hear you've been zoning out in class lately. Get your head on straight."
She kept hammering me with irritated lectures for what felt like forever. She could have scolded me quietly at home, but expecting that kind of consideration from my stepmother was a luxury.
In the end she only left the classroom once break was over, still fuming over my grades. I trudged back to my seat and dropped into my chair. Jinsu, who'd watched the whole thing with pity in his eyes, asked,
"Your stepmom is seriously scary… You okay?"
"I'm used to it by now. More importantly—can I come straight over to your place after academy?"
"Yeah. Anytime today is fine."
The moment academy ended, I'd get to see Auntie. Just knowing that was enough to lift the gloom that had settled over me.
After academy let out, Jinsu and I headed straight to his place. I punched in the door code and stepped into the entryway like always—only to feel something off. Auntie, who normally came out to greet us, was nowhere to be seen.
"We're home~ What, is nobody here?"
"I hear something from the living room."
We headed that way and found Auntie sitting on a yoga mat, deep in meditation.
In her comfortable yoga clothes, she was so captivating I couldn't look away. Cross-legged, eyes closed, her body gleamed with sweat. Then she must have sensed us—she opened her eyes and looked our way.
"Oh, you're home, son? Sejin came with you?"
"Hello, Auntie. Is it okay if I hang out for a bit?"
She smiled with her eyes and nodded.
"Of course. Make yourself at home."
"Mom. We're eating dinner with Sejin tonight, right? I'm gonna go wait in my room."
"Ah, hang on a second, sweetie~. Can Mom ask you a little favor?"
She called Jinsu aside and made her request with an apologetic look.
"Sorry, but could you run to the store real quick and grab some tofu and onions?"
"Huh? Right now?"
"Yeah. I need them for dinner, but I completely forgot to buy the ingredients… Mom's in the middle of yoga and busy, so could you go get them for me?"
…A scheme to get Jinsu out of the house.
I couldn't help but admire Auntie's errand strategy. Completely oblivious to the dirty ulterior motive behind her request, Jinsu just nodded.
"Ugh, what a pain… Fine, I'll go grab them quick. Sejin, you wanna come to the store with me?"
"Sorry. I'm just gonna rest in the room first."
"Tch. Cold bastard…"
Grumbling, Jinsu had no choice but to head back out on Auntie's errand.
Which left Auntie and me alone in the living room. Still sitting on her yoga mat, she quietly smiled at me with her eyes. Why did she look even sexier in that yoga outfit than if she'd been completely naked?
The leggings clung to her lower half, tracing every curve of her hips. Combined with a sports crop top that left almost nothing to the imagination, her figure was pure fantasy. You could tell at a glance how carefully she took care of herself—every line of her body was beautiful.
"What's wrong, Sejin? Did you need something from Auntie?"
Feeling my stare boring into her, she asked with a smile. Normally I would have made up some excuse to keep up the act of a normal relationship—but Jinsu wasn't home.
I didn't bother hiding the heat in my voice as I sat down on the sofa.
"Auntie's body is just too fucking hot."
"Hehe… Guess all that daily maintenance is paying off."
"For real. Your body is way prettier than any model on TV."
The praise clearly pleased her; she smiled. She sat there sending me that eye-smile, just watching me. …Why was she staring so hard? It was making me self-conscious. My gaze drifted to those red lips—and right then,
Auntie casually spread her legs to the side.
"…Huh?"
And I saw it clearly. Through leggings so thin her bare skin showed right through, the dark patch of her pubic hair. Her pussy was fully visible beneath the stretched fabric.
So that was why she hadn't come to the door—why she'd been sitting cross-legged on the yoga mat…
She wasn't wearing any panties.
The leggings she had on were practically as sheer as stockings.
The sheer boldness of greeting Jinsu and me with no panties under fabric that would show everything the moment it stretched even a little—I couldn't help but be impressed.
"Auntie… you're not wearing panties?"
"Mm. It's more comfortable this way for yoga…"
Comfortable, my ass. This was all designed to drive me crazy. And damn if it wasn't working—my cock was rock-hard, the outline clearly tenting my pants.
Still smiling, Auntie kept shifting poses on the yoga mat. Each time, she casually showed off some part of her body—a glimpse of cleavage between the crop top, or playfully stepping on my foot with her bare sole.
And because those leggings were so thin, every movement made the inside completely visible, offering little flashes of her neatly trimmed pubic hair.
Bare feet, legs, the nape of her neck, her cleavage…. One by one she burned each part of her body into my mind, until finally she raised her arms and casually flashed her sweat-damp underarms, smiling at me with her eyes.
"Sejin."
"Y-yes!?"
"Want to watch Auntie do yoga…?"