My sister-in-law rubbed my back, and that's how our ambiguous relationship began.

At the time, I was a high school student. Due to my poor grades, I didn't get into my ideal key high school after the high school entrance exam. My parents sighed and scolded me for being disappointing. They spent money and pulled strings to get me into the provincial key high school, City A No. 2 High School. However, since it was in a different city, and I wasn't used to boarding school, my mother asked my cousin in City A to take care of me so I wouldn't have to come home often.

Since my parents were business people, they didn't usually nag me much, and I was happy to be rid of their nagging. So, I happily moved to City A, agreeing that my mother would send money to my cousin every month for my living expenses, while my allowance would be separate.

My cousin had only recently started working as a salesman. Faced with the extra budget my mother gave him each month (which was more than my food, drink, and accommodation expenses), and the fact that he was newly married and had many expenses, he readily agreed.

On the day I left, I grabbed my laptop and my precious hard drives, and my brother put my suitcase full of clothes in the trunk. My mom was still nagging me about studying hard and not causing trouble, but I waved impatiently, letting him drive off. Freedom! I could already smell it!

My brother is 10 years older than me and has been married for a little over a year. Because they live far away, he only comes to my house a few times a year. I only remember my sister-in-law being thin, 7 years older than me, and not very talkative. Every time we ate together, she would always snuggle up next to my brother. Since they weren't planning on having children yet, I guess I could live carefree at their house for the rest of my high school years. After a 3-hour drive, we finally arrived at my brother's building. My sister-in-law was already waiting for us downstairs. The weather in City A is hot in the summer. I glanced at her; she was wearing a white tank top and a short light blue skirt. She had a rather innocent, housewife-like feel to her.

My sister-in-law is a software developer, so basically... She was a semi-stay-at-home mom, only busy when there were new projects at the company. She had clearly just received a call and came downstairs. She was wearing slippers and the work glasses she wore were perched on her nose. Her shoulder-length hair was dyed a light brown and casually piled on top of her head. She had a fair, oval face, and her features resembled one of my favorite actresses—Miku Ohashi.

Her current attire, combined with the glasses, made her look exactly like Ohashi in a certain teacher-themed film. I couldn't help but feel a little embarrassed. Plus, in the afterglow of the setting sun, I could vaguely see the outline of her white bra, which reminded me even more of scenes from adult films. I quickly composed myself and greeted her.

"Xiaowei, help Xiaolong get the suitcase down. I'll go park the car." My brother-in-law leaned out of the car window and spoke to his wife, then turned back to me and said, "Take your things and go upstairs with your wife. I'll go park the car." I agreed and opened the car door, lifting the trunk to get my luggage. My wife bent down to help me, and as she bent over, I caught a glimpse of what was under her shirt—a white bra supporting two round mounds of flesh, as if they would roll out if I bent down any lower. I wanted to take a few more glances, but afraid my wife would notice, I quickly reached for the suitcase.

"Sister-in-law, it's alright, I'll do it," I said politely.

"It's alright. What's in your suitcase? It's quite heavy," my wife joked as she helped me lift it.

"Oh, just clothes, and a few books, notebooks, and stuff." Of course, I couldn't tell her that there were my precious magazines and novels inside, so I could only give a vague answer.

Once in the room, after sending my sister-in-law out, I started packing. "Packing" was really just about hiding "contraband" items like pornographic books; the rest I just haphazardly stuffed away and called it a day. Thus began my life living with my brother and sister-in-law. My

first year of high school was uneventful, not too stressful. I spent my days socializing and eating with my brother and sister-in-law. However, my brother often had social engagements, so it was always just me and my sister-in-law eating together. We shared a bathroom, and while showering, I often saw my sister-in-law's underwear, washed or unwashed, hanging there. After a few times, I finally couldn't resist my lust anymore. I would pick it up and smell my sister-in-law's scent, and I would masturbate with her underwear. But I was always extremely careful and never dared to ejaculate on it, so I wasn't discovered.

The most arousing moment for me was one night when I drank too much water and got up to use the bathroom. Passing by my brother and sister-in-law's room, I vaguely heard my sister-in-law moaning. I was incredibly excited and leaned against the wall to listen carefully. All I could hear were my sister-in-law's moans of pleasure and my brother's heavy breathing.

Although I've watched countless pornographic films, this was my first time experiencing something like this live. My penis was already incredibly erect, my underwear bulging. Because the door was ajar, I was afraid of being discovered, so I quietly went back to my room. Of course, I ended up watching porn to relieve myself, and I felt like I ejaculated a lot that time. That night, I drifted off to sleep thinking about my sister-in-law's body, and for several days afterward, I felt a little embarrassed whenever I saw her.

In short, life at my brother's house was a case of having lustful thoughts but lacking the courage to act on them.

Time flies, and my first year of high school passed by in a daze… (I think everyone feels the same way…). Before I knew it, it was summer vacation after graduating high school. My parents were happy to hire a nanny to take care of me, and I was too lazy to go home. Thinking about how I was free and unrestrained at my brother's house, with no one bothering me about what I watched, I decided to stay there.

The first few days were the same as always. After my brother went to work, my sister-in-law would do her own work in her room, while I stayed in my room playing games on porn sites. My sister-in-law would occasionally offer me fruit and water. After lunch and dinner, my brother would come home, and we would chat and laugh for a while, watch some good TV programs together, and then go back to our own rooms.

Every few days, I would go out and fool around with my friends, having a great time. Just when I thought this vacation would be wasted again, heaven rewards those who persevere!

That evening at dinner, my brother told us he was going on a business trip for over a week. His company needed him to contact clients in another city for a new project. Hearing this, I couldn't help but feel a surge of excitement; this was a perfect opportunity to be alone with my sister-in-law! Stealing glances at her, I saw she seemed reluctant to leave, and she said coquettishly, "Don't you dare flirt with other men while you're out. Come back soon." My brother chuckled sheepishly, and that was the end of it.

However, that night I tossed and turned, unable to sleep. The image of my sister-in-law's moans that I had heard earlier kept replaying in my mind. I imagined pinning her down and making love to her, and I couldn't help but feel excited. So I got up and went to a porn site to read novels, not missing a single one with the word "sister-in-law" in it. My mouth got dry, so I started drinking water while reading.

After a while, I lay back down on the bed, but this time, my mind was filled with all sorts of scenarios, making it even harder to fall asleep. I was imagining how to be intimate with my sister-in-law, but it was all just wishful thinking. I drifted off to sleep... That night, my dreams were filled with images of my sister-in-law... The next day, after seeing my brother off, I returned home and there was still no conversation. All the scenarios I had planned the night before vanished when I saw my sister-in-law... I didn't dare to make any moves. So, when I got home that night, I took out a Coke and continued to browse online for "sister-in-law" stories, hoping to meet her again in my dreams... The next morning, I was woken up

by the urge to pee. I rushed to the bathroom without even getting dressed, and when I opened the door, I was shocked to see my sister-in-law inside! She was wearing a light pink silk nightgown, sitting on a plastic high stool in the bathroom, with her feet propped up on the bathtub, applying nail polish. Because one leg was raised, the already short nightgown had slipped down to her thighs, revealing her long, sexy legs, and I could vaguely see the shadow of her underwear. I froze on the spot.

My sister-in-law was startled when I pushed the door open and exclaimed "Ah!" I then realized I wasn't wearing any clothes, and because of morning erection and needing to pee, my penis was rock hard, almost jumping out of my underwear. I quickly covered my genitals, apologizing profusely, and hurriedly retreated. My sister-in-law seemed to realize I needed to pee and quickly came out, laughing as she said, "You little rascal, I always see you not getting up until the sun's high in the sky. You must have been holding it in today, huh? You're so pathetic. Go on, go on." She then went into her room.

I smiled awkwardly, thinking that since I usually get up so late, my sister-in-law assumed I wasn't awake yet and hadn't changed my clothes.

As I went into the bathroom, I secretly glanced at my sister-in-law's back. Her thin silk bra clung to her full hips, revealing the outline of her underwear. Her two shapely, straight legs swayed as she swayed back to her room. I immediately felt a throbbing urge, wanting nothing more than to pounce on her and pin her down, fulfilling my desire. Unfortunately, it was just a fantasy. Reluctantly, I closed the door and went inside.

At lunchtime, I felt a little embarrassed and apologized to my sister-in-law, but she just smiled, made a face at me, and didn't mention it again. I spent the afternoon playing games in my room, and my sister-in-law didn't come to call me for fruit. Then, when it was time for dinner, I heard her calling me from outside. I quickly went out and saw that the food was already laid out, so I sat down to eat with her.

The meal was quite plentiful, including my favorite braised pork. My sister-in-law smiled and pulled out a bottle of red wine, asking, "Want some? Your brother drinks every dinner, you know, he says it's in your family's genes, haha, let's see if you'll have any?" I'm known as one of the biggest drinkers among my brothers, a real workaholic, and although I rarely drink red wine, I wasn't about to be outdone, so I let her pour me a glass, and she poured herself half. We ate and chatted, talking about her work and my studies, etc.

After dinner, I helped my sister-in-law clear the dishes. Seeing her about to wash them, I went to the living room to watch TV.

A little while later, my sister-in-law finished washing the dishes and came over to ask, "Have you taken a shower?" I said no, and she insisted on showering first. Of course, I agreed, especially since she'd have some underwear to play with after she showered. Thinking about how I hadn't released my pent-up desire in days, I decided to use my sister-in-law's underwear to relieve my urges.

I waited in the living room, listening to the rushing water from the bathroom. My mind wandered, and I completely forgot about the TV program, imagining what my sister-in-law was doing. Was she masturbating because she was lonely with my brother away?

Just as I was lost in my fantasies, I suddenly heard my sister-in-law let out a soft "Ah!" from inside. Then the water stopped, and I heard her call me from inside: "Xiaolong, I forgot my towel, could you get it for me?" I quickly agreed, asked where it was, and ran into her room to get it. After getting the towel, I couldn't help but glance into her closet. I saw one drawer was open, and when I looked inside, it was full of underwear in various colors. She must have forgotten to close it when she got a change of clothes. Looking in the corner, I even saw some sexy lingerie! It seemed to be a pink nurse's uniform, as well as semi-transparent bras, thongs, and so on! So this was another side of my sister-in-law!

I was about to take out a towel to examine it closely, but then I worried my sister-in-law might get impatient and suspicious, so I thought I 'd take the towel

over first and check it later. With that thought, I rushed to the bathroom door and called to her. The door was slightly ajar, and she reached out, took the towel, and said thank you. Just as I was about to turn back, she stammered, "Xiaolong, um… could you do me a favor?" I asked, puzzled, what favor? She hesitated, then said, "Come in and help me wash my back. I can't reach it, and your brother isn't here." I was stunned. Wasn't this like inviting trouble? I couldn't be happier! After pretending to think for a moment, I agreed. I carefully opened the door and saw my sister-in-law sitting on a high plastic stool with her back to me, her face wrapped in a bath towel, her hands covering her front. Her hair was wet and tied up, and her smooth, white back came into view, along with her slender waist and the end of her buttocks, like a model in a figure of art. I quickly looked away, afraid of losing control.

My sister-in-law said in a soft, mosquito-like voice, "Please... just spread the scrub evenly on my back, that's all." She pointed to the scrub on the dressing table and turned her face away.

I hurried over and started applying the scrub to my sister-in-law's back. Although she was covered by the bath towel, I could still see the outline of her breasts from behind. My sister-in-law supported her breasts with one hand and placed the other between her legs, as if afraid my eyes would see through the bath towel. But the more she did this, the more aroused I felt. I felt my penis gradually swell up between my legs, becoming uncomfortably hard.

I quickly tried to stop thinking about the scene before me, lest my sister-in-law discover my embarrassment, but for a virgin like me, that was easier said than done!

I don't even remember how I finished applying the scrub; I only remember rushing out, my mind still filled with the image of my sister-in-law's naked back and the outline of her breasts… After a while, my sister-in-law came out wrapped in a bath towel and called me to come in and shower.

I agreed and ran to the house to get a change of clothes and a bath towel. Seeing that my sister-in-law's door was already closed, I realized I had forgotten to admire her lingerie, and I couldn't help but feel regretful.

After showering and washing my hair in the bathroom, I was fortunate enough to find my sister-in-law's underwear in the bathroom, which she hadn't had time to wash yet, just tossed in her laundry basket.

As I showered, I smelled my sister-in-law's underwear, imagining her scent. My penis unconsciously became erect, as if protesting the neglect I'd shown it these past few days. I started masturbating while inhaling her scent… Suddenly, I heard her calling me from outside, startling me. I quickly threw my underwear back into the laundry basket and asked in a panic, "What is it?"

"Nothing, I was just thinking I'd help you wash your back, as a way of thanking you!" "Ah? No, no!" I quickly refused, afraid she'd see me still hard… "It's okay, what are you shy about? I'm your sister-in-law, I'm not going to look at your treasure, haha!" My sister-in-law seemed insistent, so I had no choice but to agree.

After wrapping myself in a towel, I called her in, but I covered my genitals with the towel and then used my hand to hide it, afraid she'd see through me.

My sister-in-law was only wearing pajamas. Her hands were gently applying scrub to my back. I tried not to think too much, afraid that I would do something out of line. I just stared intently at a tile on the wall, as if trying to figure something out. When my sister-in-law saw my blank look, she just smiled.

After a while, she finally finished wiping me down. I was just about to breathe a sigh of relief, thinking it was all over, when my sister-in-law playfully said, "Let me put some shower gel on your back!" I panicked, unsure whether to agree or not, so I just mumbled an "okay," remaining in this awkward position, afraid to move. My sister-in-law smiled, poured the shower gel into her hands, lathered it up, and then applied it to my back. This time, the feeling was completely different from before. The scrub was a bit rough, so it didn't feel like much, but this shower gel was a completely slippery caress. I thought of the oil massage scenes in movies, and with my sister-in-law's smooth little hands sliding over my back, the desire I had just suppressed rose again, and my manhood began to swell. I hurriedly tried to hide it, my face turning bright red.

My sister-in-law seemed not to notice and continued applying the gel. I felt her hands moving lower and lower, already reaching my waist. I knew it was almost over, and I breathed a sigh of relief, hoping she would finish quickly and leave, but deep down, I was also expecting something. What was it? I dared not think any further… Suddenly, my sister-in-law's hands abruptly turned and grabbed me from behind, reaching under my towel and seizing my throbbing, hard penis.

"Haha, I caught you!" she laughed lewdly.

I was completely stunned, stammering, unable to speak, not understanding what she meant.

"You little rascal, do you think I don't know you use my underwear to relieve yourself? Even if you don't ejaculate on it, it'll still get shiny stuff on it, you silly boy. And you secretly watch porn in the room? Huh? And you even dare to fantasize about your sister-in-law, what's your punishment?" I was speechless, not understanding what she meant, only opening my mouth but not knowing what to say.

My sister-in-law saw my silly look and burst out laughing. She pulled my towel down, exposing my entire penis. She laughed lewdly and said, "What's wrong? Haven't you been thinking about this every day? Why are you chickening out now?" I quickly struggled, saying, "Sister-in-law, stop it! You're my sister-in-law!" "Haha, now you know? It's okay, if neither of us tells you, who will know? Don't pretend, look how hard it is! Are you feeling uncomfortable holding it in?" Actually, this had been my dream all along. I was only half-heartedly going along with it. Since my sister-in-law was like this, what did I, as a man, care about morality? I'd just enjoy myself first!

My sister-in-law was still holding me, her hands gripping my erect penis, her foamy hands stroking it back and forth. Although I masturbate often, this was a completely different sensation!

Her slippery hands moved back and forth on my penis, occasionally caressing the glans. The itchy pleasure made me want to scream. As she worked, she breathed into my ear and licked my earlobe: "How is it? Is it good, sister-in-law?" "Uh... good..." "Is it comfortable?" I could see the lewd smile on her lips in the mirror, which drove me even crazier.

"Comfortable, so incredibly comfortable, a thousand times better than doing it myself!" I stammered.

"Don't rush, the best is yet to come!" My sister-in-law turned me around and slowly took off her nightgown. Her breasts seemed to jump out and land in front of me. These were the breasts I had always dreamed of! Although not

huge, they were definitely enough. Her fair skin contrasted with her pink nipples and areolas, and she was wearing a thong!

My sister-in-law turned around, her white, plump buttocks swaying in front of me, slowly rubbing against my penis. I was still sitting on the stool, and I could only feel my penis being squeezed between her buttocks. I grabbed my sister-in-law's breasts with both hands and rubbed them to my heart's content.

"Good sister-in-law, let me kiss them!" I pleaded. My sister-in-law turned around with a flirtatious laugh and sat in my lap. I hurriedly leaned in and kissed her breasts, licking and kissing them. I grabbed one breast with one hand and kneaded it. I heard my sister-in-law let out a soft moan, so I played even more enthusiastically, especially focusing on her nipples, licking, biting, and pinching them, wishing I could swallow them whole... After kissing for a while, I started kissing my sister-in-law's lips. Although it wasn't her first time kissing, my sister-in-law was definitely experienced, unlike the naive girls in high school. Her sweet tongue was soft, like jelly. I couldn't help but stick my tongue in and savor it. Our tongues intertwined and embraced each other. My hand then moved to my sister-in-law's lower body and pulled down her thong. My sister-in-law was already overflowing with lustful fluids.

I couldn't help but get aroused and struggled to push my sister-in-law down. I had already forgotten that we were in the bathroom. My sister-in-law moaned, "So eager? This is the bathroom! Haha, shall we go play on the bed?" I realized what was happening and quickly stood up. We rinsed off the soap together, and I picked her up and carried her to the main room.

My sister-in-law laughed lasciviously, "Oh, Xiaolong, you're so strong, hahaha!" I put her on the bed, spread her legs, and her tender vulva was right in front of me. She didn't have much pubic hair, so it looked very clean. Her thick, plump labia enveloped her clitoris, and a trickle of fluid flowed out. I lowered my head and kissed her. She moaned and pushed me away with a laugh, "You're dirty, you fool." "I'm not dirty!" I mumbled indistinctly, mimicking scenes from porn. I started licking her vulva up and down, and her juices kept flowing out. I spread her vulva open and began attacking her clitoris, gently licking it and licking it incessantly. Her waist began to twist.

"Ah...good Longlong...darling...darling sister-in-law feels so good..." I raised my head and used my fingers to tease my sister-in-law's clitoris, asking, "How is it, sister-in-law? Has my brother ever licked you like this?" "Good girl, you're such a good darling, he doesn't know anything about this..." my sister-in-law said, panting heavily.

I lowered my head again, my fingers still teasing her clitoris, while my tongue moved towards her vulva, the tip of my tongue sticking in and licking. With this two-pronged approach, my sister-in-law gradually began to pant heavily.

"Ugh...so...so itchy...mmm...Little Long is licking sister-in-law so comfortably...licking sister-in-law's tender vulva...ah...ah..." My sister-in-law's moans began to speed up, I knew she was aroused.

"Good girl, Longlong, hurry...take your big cock and fuck me, my vulva is so itchy, hurry, fuck me...ah...it's itchy, I want your...big cock..." Just what I wanted! I quickly mounted her, my penis already hard. My sister-in-law stroked it and said, "Baby, first time, right? Haha, wow, it's much bigger than your brother's! Come on, let me make you feel like you're in heaven!" To be honest, this really was my first time. I'd only seen it in movies, but doing it myself wasn't so easy. I searched for ages but couldn't get it in. I just kept thrusting against my sister-in-law's lower body, getting really impatient.

My sister-in-law chuckled and said coquettishly, "Little monkey, what's the rush!" Saying that, she spread her legs, grabbed my penis, and guided it into her vagina. Oh

my god! This feeling was indescribably amazing, like being sucked in by something. My sister-in-law's vagina was warm and slippery, a pleasure I'd never experienced before. I started thrusting.

At that moment, my sister-in-law was moaning loudly, "Ah, so good, Xiaolong... mmm... so good, ah... big cock... big cock is inside..."

She shouted loudly, "Mmm... so comfortable... come and fuck your sister-in-law... sister-in-law... you're fucking me to death... ah... so good..." Urged on by my sister-in-law's lewd words, I started thrusting like a madman, moving incessantly, muttering, "Fuck you to death, you seduced me, seduced me!" My sister-in-law laughed lewdly as she wrapped her legs around my waist, shouting loudly, "Oh... I won't dare anymore, my little slut won't dare to seduce you again... mmm... you're fucking me to death..." With my sister-in-law's lewd moans, I felt myself getting aroused. I'd heard that the first time you ejaculate is quick, and it was true. I felt a pleasure rising from my waist, about to ejaculate. I held back and continued thrusting.

"Sister-in-law, I'm going to...uh...I'm going to cum..." "Mmm...good baby...cum inside Xiaowei's pussy...mmm...cum all of it into me...Xiaowei lets you cum all of it into me..." "Xiao...Xiaowei..." I had long forgotten about the trivial matters like whether I would get pregnant. All I could think about was that I wanted to cum all of it into my Xiaowei, into my sister-in-law. I sped up and started the final sprint. I had read online that the more you hold back before ejaculation, the more you can cum and the more pleasure you will have. I started thrusting rapidly, holding my breath...

"Ah...ah...baby, fuck me to death, ah...ah ah..." My sister-in-law started moaning wildly, and her waist began to involuntarily respond to my movements. Her hands were wrapped around my neck.

"Ah...I can't take it anymore...sister-in-law...sister-in-law is going to heaven..." My frantic thrusting and the incestuous stimulation drove my sister-in-law to madness.

"Ah...ah ah ah...mmm ah..." My sister-in-law's moans became increasingly sharp, and I thrust even harder and more frantically, trying to push us both to orgasm together.

Finally, with a soft moan, my sister-in-law's abdomen began to tremble violently. Her legs and feet released me, and a flush rose on her face. I knew she had orgasmed. Hot vaginal fluid flowed from her vagina, splashing onto my glans. I couldn't hold back any longer.

"Ugh... Sister-in-law... Xiaowei... I'm coming..." I gripped my sister-in-law's beautiful breasts tightly and thrust hard, ejaculating inside her for the first time in over a decade!

I tried my best to shoot my semen forward, feeling like I had never ejaculated such a large amount before. I thrust on my sister-in-law for almost five seconds before emptying my bladder completely, then collapsed onto her, sharing the wonderful orgasm with her.

We lay side by side on the bed, and after a long time, I suddenly felt my sister-in-law's hand reach for my penis again.

"Oh, it's gotten smaller, Xiaolong, did you enjoy it?" "Great, it feels so good, sister-in-law, I love you to death!" "Haha, I feel great too, come on, let me make you feel even better!" After saying that, my sister-in-law stacked two pillows together and made me lean against them. I seemed to realize what was about to happen, but I was still very excited.

My sister-in-law made me lean back properly, spread my legs apart and started licking my body, especially my nipples, which made me feel so itchy. Slowly, my sister-in-law's tongue moved down, and she used her slender hands to lift my limp penis and sighed, "Such a good thing, and it's gotten so small after you used it. Don't worry, I'll help you!" After saying that, my sister-in-law cupped my penis with both hands, opened her mouth and let her saliva flow onto my penis, and then used her hands to catch the excess saliva and began to smear it all over my penis.

"Sister-in-law loves sausages the most! Come on, let me try Xiaolong's sausages!" My sister-in-law said, bringing her face close and rubbing her smooth cheek against my penis. Then, slowly, she opened her cherry-like mouth and took the glans into her mouth.

"Ugh..." I groaned. This feeling was different from sex. Her mouth was warm, and I could feel her teeth gently touching my glans. It felt incredibly good.

My sister-in-law's tongue began to skillfully roam around the glans, paying special attention to the urethral opening. Every time her tongue licked the urethral opening, I shivered with ticklishness.

"Ah... sister-in-law... so good... ticklish." My sister-in-law, with my penis in her mouth, just looked at me lustfully and made moaning sounds. Then, she began to move, putting most of my penis in her mouth and starting to move back and forth.

Because of my youthful vigor and my sister-in-law's truly skillful technique, I quickly became erect again. My enlarged penis was so big that my sister-in-law could only spit out a little bit, focusing only on the front. Her mouth was wide open, and saliva dripped from the corners of her mouth down my penis.

My sister-in-law stroked my penis with one hand and played with my testicles with the other, sometimes licking the glans, sometimes licking the base, sometimes sucking on my testicles. Gradually, I also felt something and started to move on my own. Watching my penis in my sister-in-law's mouth gave me a strange kind of pleasure, so I stood up and made my sister-in-law kneel on the bed to give me oral sex.

It was so stimulating that I gradually felt the urge to ejaculate again. My sister-in-law understood and started to cooperate, increasing the speed. I thrust in and out of her mouth at least a hundred times. Then, I suddenly thrust forward, pressing her head down towards my penis, and thick semen gushed out, shooting into her mouth… My sister-in-law smiled and licked the remaining semen clean before going to the bathroom to rinse her mouth. When she came back, she snuggled into my arms and said coquettishly, “Little Dragon is naughty! Why did Little Dragon ejaculate in my mouth?” I pulled her closer and laughed, “I couldn’t help it, you were making me feel so good, I couldn’t hold back…” We joked and laughed for a while before falling asleep in each other’s arms…

From then on, my sister-in-law and I made love almost every day. On the bed, the sofa, the floor, the toilet, the dining table… everywhere bore the marks of our lovemaking… doggy style, riding position, 69… we constantly tried new positions, even after my brother came home. My sister-in-law would sneak into my room while my brother was showering or on the phone to make love to me, and she would give me oral sex.

Under her tutelage, my technique improved, and I could often bring her to orgasm twice before I ejaculated… This continued until I graduated high school and had to live on campus for university. However, I would still occasionally sneak out to have sex with my sister-in-law in hotels. Even after I had a girlfriend, my sister-in-law was always my mentor, and we still made love together from time to time. And when I made love with my girlfriend, I would often involuntarily think of my sister-in-law. Those three years of high school were truly unforgettable memories…

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My sister-in-law rubbed my back, and that's how our ambiguous relationship began.

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