My sister

First of all, regarding this post, I want to say that if you can't accept real-life events, please believe it's fictional. I'll refrain from moral judgment; everything I've said is fictional. I don't have a sister, and I have no sexual experience. It's all fantasy, that's just how the internet is. But if you're an enthusiast of this kind of thing, or even someone with experience, I think you're already familiar with this kind of content...

My sister isn't anything special—short, not very busty, but she has a large, surprisingly firm butt. At home, my sister and I often only wear one pair of underwear, and a large portion of her buttocks are exposed outside her usual black nylon underwear. Since junior high, I've doted on my sister, always rushing to do chores and homework for her. Therefore, although my sister often says I'm disgusting and a siscon, we've actually always had a very good relationship. This pure and beautiful love eventually turned sour when I was in high school.

My brother and I slept together when we were little, and only started sleeping in separate rooms after junior high. But we would still sleep together from time to time, chatting until midnight before going to sleep. One day, my sister fell asleep first after chatting, while I, being a night owl, was awake. My sister was sleeping on my left, with her back to me. I turned over to turn off the nightlight, but that's when I saw the beginning of my transgression.

My sister's blanket was rolled up, and her back, wearing a tank top and black nylon underwear, was clearly visible in the nightlight. That little pair of underwear couldn't hide my sister's peach-shaped buttocks at all, and the slightly elastic lace edge was gently pressed into her breasts.

A tingling sensation surged through my body, like when I first saw an adult DVD as a child. Yes, I was hard. Hardened while looking at my own sister's body from behind. I realized that my sister was also a woman, and I made an absolutely wrong decision.

I moved my body, squeezing next to my sister. Lying on my back, my left hand stopped a centimeter or two away from my sister's buttocks. Then I slightly turned over, pretending that I had touched my sister in my sleep. My hand felt the nylon and warmth; yes, I was truly sexually harassing my sister. My sister didn't react, letting me place my hand on her buttocks. So I began to push my luck, taking out my already engorged penis and slowly pressing it against my sister's fleshy buttocks. A warm, tight sensation enveloped my glans, and I couldn't help but twitch a few times. A little bit of fluid should have come out by now, right? The thought of my sister's buttocks being smeared with my pre-ejaculate made my penis even more excited, bouncing several times in succession, even getting the fluid on my right hand holding it.

Suddenly, my sister moved. I quickly withdrew my penis with a speed I didn't even realize, and rolled back to my lying position. My sister's buttocks were pressed against my left hand, the gap filled with the fluid I had just released. I was terrified, but thankfully, my sister only moved a few times and then stopped, not waking up because of the fluid on her buttocks.
This was my first offense. Considering the cleanup, I decided not to be too reckless.

After that, I often rubbed my penis against my sister's body after she fell asleep. When I lay on my side, I would stroke her buttocks; when I lay on my back, I would let my sister hold my penis. I know this sounds unconvincing, but it wasn't entirely for sexual pleasure. While my penis was against my sister's body, I would secretly try to touch her genitals several times. This

usually stopped when she turned over, but a few times, when she was really fast asleep, I managed to pull down her panties a little and put my fingers where she usually kept her sanitary napkins. I didn't insert them directly, but tried to stroke them gently (I even looked up the best way to caress a woman). Of course, it was hard to control the force when I was driven by lust, but I could usually feel enough moisture to wet a small patch of her panties. I wanted my sister to feel comfortable in her dreams, even though it was me, her own brother, caressing her.

After a while, my sister didn't sleep with me as often. I initially intended to restrain myself and stop, but something unexpected happened that plunged me even deeper into the pleasure of incest.

My younger sister was experiencing unusual behavior due to the pressure of school entrance exams, so she went to see a psychiatrist. Although she was fine, my parents couldn't understand it; they considered going to a psychiatrist shameful. So, her older brother, who had always "fought" against our parents, became her only comfort at that time. We slept together every day and, as before, talked until midnight before going to sleep.

And then, I defiled my sister's body again. Moreover, this time it was even worse, for a simple reason—the doctor prescribed her medication containing pills similar to sleeping pills. Of course, sleeping with her familiar brother also helped my sister relax a lot. In short, my sister slept very soundly for a while.

After several nights of testing, I roughly understood my sister's sleeping pattern and became bolder. My sister was lying on her back, and I supported my head with one hand while using the other.

I kissed her first. This might sound strange, but after so many previous harassments and caresses, this was the first time I had kissed my sister. As for the reason, I think it was out of affection. Then I kissed her thighs and hands with the head of my penis, and then I decided to do something quite dangerous—to take off my sister's underwear.

This was extremely risky because if my sister woke up during this time, everything would be over. Not only would it be incest, but my sister's fragile nerves would also break down.
But I did it anyway.

My sister's clean, pure vulva was thus revealed before me. I rubbed my hands together to warm them and began to caress her virginity. Within minutes, fluid flowed from her vulva down the groove of her anus onto the sheets. I slowly moved my body to avoid the sheets sinking and waking my sister.

In an instant, my face was at the entrance of my sister's vagina; I was kneeling on the floor. I stretched out my tongue and inserted it. My sister's vagina was salty, with a strong scent of her body. After a few more strokes, I couldn't resist anymore.

(Actually, I stopped many times in between; basically, I would stop whenever my sister made a sound. Please let me omit this part because I don't want to type too much.)

I first pulled her panties back on, since the chances of waking her up next were quite high. After several adjustments, I finally positioned my sister's right leg on my stomach (she was lying on her back, with her legs in a half-M shape). I lay on my side, my penis firmly pressed against her opening.

"You're so wet..."

I whispered, filled with the emotions of lovemaking, as I slowly pushed in. At first, there was considerable resistance, but with ample caresses and my sister being quite relaxed, I felt a slippery friction against her vaginal walls, and my glans was fully inside. I continued pushing, and although my sister's vagina was squeezing painfully, the incestuous pleasure kept my penis from losing its hardness. And so, I felt my pubic hair being flattened between my lower abdomen and my sister's buttocks.

My penis was now completely inside my sister's body.

I couldn't stop my muscles from contracting, and my body was constantly leaking fluid. It took me about ten seconds to steadily pull out my penis, then thrust it back in. It wasn't really thrusting, because it was very slow; I didn't want my sister to bleed or wake up in pain. After a few repetitions, I used my right hand to pull my sister closer, so my scrotum could press against her inner thigh. The fleshy stimulation of her thighs made my penis even harder, and my sister's vaginal fluid seeped into the gap between my scrotum and her thighs due to capillary action. My penis was going in and out of my sister's opening, and the sheets below were already soaked.

This continued for a few minutes, but I finally stopped because my sister started to move. I ended up relieving myself in the bathroom. This is the story of my first time penetrating my sister.

[font="]I've decided to share my second experience with my sister with you all.
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At the time, we were both university students. I lived in the university dormitory and didn't go home often; my sister lived at home because her university was close to home. I can't go into details about what happened, but basically, my sister got into a dispute with someone outside the family. With the family misunderstanding and the outsider threatening to sue her, she called me crying, saying she hadn't slept well for several days. It was under these circumstances that I rushed home to visit my sister, and she insisted on sleeping in the same bed with me.

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So we slept together again, just like we did in junior high. My sister and I talked until very late before she fell asleep, and she lay closer to me than usual. She really needed my comfort, I think, and that stirred up the urge to cherish her again.

I waited until she started snoring softly before I began to act.

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As usual, I first pulled out my already rock-hard penis, leaned against my sister who was sleeping on her side with her back to me, and then reached out to hug her. Smelling her fragrance, I gently caressed her small breasts. My penis throbbed against her buttocks, enjoying the warm, fleshy feel. Then I moved my hands to her lower body, resting my face near her shoulder. My sister's slightly elevated body temperature and her unique scent excited me even more. I easily found the bottom of her underwear, teased it a few times, and then boldly slipped my fingers inside.

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My sister's opening was already slightly damp, and it became even wetter under the caress of my fingers. Her snoring remained unchanged, indicating that she was truly fast asleep. Perhaps it was because her brother was there? Thinking of this, I felt an even stronger urge to "love" my sister.

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After adjusting our positions, my sister and I were in the standard rear-entry position, but we were both lying on the bed.

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My erect penis pressed firmly against the bottom edge of my sister's panties. Through the nylon fabric, I could clearly feel her warm, moist fluid seeping out. Was she having a wet dream? I gently pulled down her panties, just millimeters away from breaking the taboo again. In the dim light, I watched my glans, glistening with pre-ejaculate, kiss my sister's labia, then slowly part them. In the warmth, wetness, and friction, I entered her again. This vagina, where I had taken her virginity, seemed to have a mind of its own, gently embracing her brother's penis and swallowing it.

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I held my sister's fleshy buttocks and began to move. Having had the experience before, my movements were more skillful this time. My penis slid smoothly in and out of my sister's vagina, accompanied by a small amount of vaginal fluid constantly overflowing. I was truly having sex with my sister now, I thought, while constantly speeding up, thrusting my burning hot penis deep into my sister's body again and again. My sister's snoring became weaker, but her body did not move noticeably, still letting her brother thrust into her lower body.

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A few minutes later, I decided to change positions.

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I turned my sister over so she was lying on her back and spread her legs into an "M" shape. Her vagina, which had just been violently penetrated, was full of vaginal fluid, glistening in the dim light. There was still no movement, so I entered her again, my sister. She opened her legs wide to her own brother, letting our genitals meet. After a few thrusts, a tingling sensation ran through my glans; I was about to ejaculate.

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I've decided to ejaculate inside my sister.

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My penis stretched almost to bursting, thrusting straight into my sister's body, and then, like urinating—I could even hear the sound of myself ejaculating—I came inside my sister. My scrotum shrank to a slightly painful size, feeling as if all the fluid in my lower abdomen was being emptied. I bent over, once, twice, three times… panting, enduring an ejaculation that felt like a fusion of hell and heaven.

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I pulled out my limp penis and looked at my sister's genitals, a mixture of vaginal fluid and semen. I could only quickly clean up with toilet paper before holding my sister and falling into a deep sleep...

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[font="]In the morning, my sister didn't show any unusual behavior; she interacted with me as usual. But I knew very well that when she was washing fruit with her back to me, I was fully aware that my semen was flowing inside that body with its wanton, pert buttocks…

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