Sex Education Is a Mother's Duty!
She came home, greeted her son who was there alone, and that was all.
It worked!
It had only been a simple hello, yet his reaction was so strangely awkward compared to usual that she knew things were unfolding exactly according to her plan.
In front of her son she kept up her ordinary demeanor, but her heart was hammering as she opened her bedroom door. The sight of the empty bed alone sent a flush of heat through her body.
"Wait… this smell—"
She approached the place where she had left her underwear. A familiar scent she had long since forgotten hit her, and her body responded on pure instinct; a deep throb rolled through her lower belly.
"I-it still smells this much after so long… ah♡"
So much time had passed, and yet the smell of semen clung so stubbornly that the shock of it—and the thought that he had masturbated while looking at her underwear—made Jihee shudder violently and climax, light and sudden.
Am I really a woman who comes this easily?
No matter how long she had been starving, the fact that a faint leftover scent alone could push her over the edge left her stunned.
"God, I'm already this soaked…"
The panties she was wearing were already drenched. She considered changing, then thought how much more thrilling it would be to go to her son's room like this—wet—and left them on. First she headed to the laundry room to check whether the underwear she had left that morning was still there. Only after she had done her best to calm her racing excitement did she make her way to Heetae's room.
"……"
"……"
When she entered Heetae's room, she followed the faint scent of her son's semen to the wardrobe. Just as expected, her underwear was inside. Seeing it stiff and caked with dried cum, she secretly leaked more of her own juices while gazing at him.
"It's been a while. Shall we talk for a bit, Mom and son?"
Mother sat in the chair; I sat on the bed, the two of us facing each other. Shame, humiliation, and guilt kept my head down. Mother sat with her back straight and her legs crossed, looking completely composed. The panties stained with my semen in her hand made my nerves scream, but this was no time to speak, so I stayed silent.
"So this was you, Heetae?"
"……Yes."
She held the panties out in front of my face and pressed the question. Not a single excuse came to mind. I answered honestly and dropped my head again.
So this is how I get kicked out of the house…
I had wanted to leave eventually, but being driven out like this and turning the family atmosphere awkward was the last thing I wanted. Still, after what I had done, I figured I had no right to complain and resigned myself to it.
"Really, how many times did you do it to get them this filthy?"
"J-just once! Only once!"
"Once? Really?"
"Yes…"
Threatened with an even more unfair misunderstanding, I blurted out the truth without thinking—that I had only done it once. The moment the words left my mouth I realized there was no need to get so heated about it now, and my face burned.
"Even so, you shouldn't do this with your mother's panties and bra."
"……I'm sorry."
You're the one who left the panties you'd masturbated in! I wanted to shout, but saying it now would only dig my hole deeper. I swallowed the words and kept my head bowed like a criminal.
"Huuu~ It's all right. You don't have to look so guilty."
"Mom?"
The unexpected words made me lift my head and look at her. Mother was gazing at me with an extremely tender expression. Her cheeks were faintly flushed, which struck me as obscenely erotic, but I wasn't far gone enough to say that out loud.
She set the panties on the floor, came over to me, and wrapped me in her arms.
"!!!"
The completely unexpected action froze me solid—but the soft, heavy press of Mother's breasts against my face made my cock start to stiffen of its own accord.
It felt like a pair of enormous soft rice cakes were smothering my face. My body went limp, and I found myself wrapping my arms around her back as well. The same scent I had smelled on the panties earlier seemed to rise again. Relief and arousal washed over me at once, and I savored the moment as slowly as I could.
"Oh my."
"Th-this is—!"
We stayed locked in that embrace for about five minutes. When we finally pulled apart, Mother saw the tent pitched in my pants. I thought I had ruined the nice atmosphere and hurriedly tried to cover myself with my hands, but she paid it no mind at all. She simply knelt in front of me and behaved exactly like a gentle mother soothing a child who had done something wrong.
"It's okay. I'm your mother, aren't I? Come on."
"Uuugh…"
Mother took my arms gently and slowly spread them. I could have resisted if I used force, but the atmosphere made resistance impossible. I let her weak pull guide me and dropped my hands, exposing the erection that looked ready to tear through my pants.
Mother simply stared at my crotch without a word. I had no idea how to react either, so I just sat there drowning in shame.
"So this happened because of Mom, did it?"
"……"
"Hm?"
"Ugh—! Yes."
Answering honestly was too hard, so I stayed silent. Mother lightly gripped my cock over the pants. The sheer fact that she was holding my cock filled me with equal parts excitement and humiliation, and I finally gave a straight answer.
"I see."
She let go. I felt both disappointment and relief at once, and simply watched whatever she would do next without a word.
"Yes… this is Mom's fault too."
"W-what? No it isn't."
"It's fine. I should have given you proper sex education and I didn't. That's basically the same as making you masturbate with your mother's panties."
All I had done was feel a forbidden lust toward my mother and act on it, yet she kept insisting it was her fault, wearing a tender smile I almost never saw from her.
To my eyes that smile looked filthy as hell, but I didn't say so. I just kept staring at her.
"If I give you a proper sex education starting now, I'll finally be fulfilling my duty as a mother, won't I?"
"S-sex education?!"
I didn't know how other families handled it, but I was pretty sure almost no mother ever gave her son hands-on sex education. Still, I was the guilty party here. I couldn't openly oppose her, so I simply watched what she would do.
"From now on, Mom will teach you everything you need to know about women."
My eyes went wide as I stared at her.
"For today, you must be tired from all the cleaning. Just rest until dinner."
With that she left the room. I sat there frozen with a raging hard-on, still unable to process what had just happened. The panties and bra she hadn't taken with her still lay on the floor.
"Ah, right."
As if she had forgotten something, Mother came back in, picked her underwear up off the floor, and spoke to me.
"Until we finish our sex education, no masturbating. Understood?"
"……Yes."
I was a full-grown adult, and my own mother had just banned me from masturbating. I watched her leave for good, then spent the remaining time drowning in filthy fantasies about what "sex education" might mean, trying to get my spinning head in order.
A little later the younger sisters came home from school—later than usual—and we all gathered for dinner.
My head still wasn't straight after what had happened earlier, so I ate in tense silence. Mother, on the other hand, acted completely normal, as if nothing had happened at all.
"……Next time, don't touch the clothes and u-underwear in my room."
"Hey, your room was a total mess—"
"A-anyway!"
"Fine, fine. Calm down."
Dohee had gone into her room, seen that every piece of clothing and underwear had been neatly put away, and immediately known it was my doing. Embarrassment as a woman made her cheeks a little pink; she scowled as she spoke. I had expected it, so I just agreed.
"Underwear?"
"When I was cleaning earlier, Dohee's room was covered in the stuff, so I took it straight to the laundry."
"Hmm. All right, I understand. And Dohee, your brother cleaned for you—you shouldn't speak to him like that…"
Mother clearly disliked the way Dohee had raised her voice and launched into a light lecture.
Seohee doesn't seem bothered at all.
I hadn't organized any clothes or clutter in Seohee's room, but I had poked around her computer a bit, so I felt a little guilty. From her reaction, though, she hadn't noticed.
"Thanks… for the meal."
Seohee finished eating first in silence, stood up, and went to her room. Dohee, eager to escape Mother's scolding, hurriedly finished her own meal and fled to her room as well.
Only Mother and I remained at the quiet table. She spoke first.
"Tomorrow Mom isn't going to work, so we'll do it after Dohee and Seohee leave for school."
"Y-yes."
I answered in a tight, nervous voice. Honestly I wanted to ask what exactly "sex education" would involve, but the situation was far too awkward. I simply said I understood and waited for tomorrow to come.
The next morning, everyone except Mother—who was staying home—and me headed off to school. Dohee and Seohee left, and only the two of us remained. The tense atmosphere left me fidgeting with nowhere to put myself.
"I'll get ready, so wait in your room, Heetae."
"Yes."
The word "ready" only pumped more excitement and nerves into me. I went to my room and waited for Mother to come.