My experience with my sister

My younger sister has always been quite voluptuous, one might even say sexy, probably due to precocious puberty.
I also think she's... well, you know.
When I was thirteen and she was nine, one day our parents weren't home. I was sitting at the table reading, and she was playing with a beanbag.
I accidentally touched her genitals, and it felt very strange; I could only feel a mound with a thin slit in the middle.
I had vaguely learned about women's bodies from books before, but I had never actually seen or touched anything like that. Touching my sister's private parts today was incredibly shocking.
I was terrified and immediately pulled my hand away, looking up at her face, worried she might scream. But she remained expressionless, continuing to play with the beanbag, though she leaned closer to me.
I relaxed and continued reading, but my mind was a jumbled mess; I had no idea what the book was about, only the feeling I'd just experienced.
I couldn't resist any longer, so I pretended to push the book forward, my hand brushing against my sister's thigh. She flinched, but showed no sign of pulling back.
Encouraged, I gently stroked her thigh, gradually moving upwards. Ah, I'd reached that spot again. I carefully felt this mysterious forbidden zone through her underwear, but soon I wasn't satisfied. I
slipped my hand inside her underwear—it was such a soft, warm place. Not a single hair. I wondered what secrets lay hidden in that crevice.
My fingers explored further inwards. I looked up at her expression; her face was flushed, her legs were trembling, and she leaned weakly against me.
Just then, the doorbell rang. Damn it! I quickly withdrew my hand and went to open the door. It was my father.
Our house wasn't big. My parents shared a bedroom, and my sister and I shared another, but we had two beds. There was a TV in the room, facing my sister's bed.
It was a hot summer evening. After showering, my sister and I lay on her bed watching TV, wearing only shorts and a t-shirt. Thinking about the adventures of the day, I felt a surge of heat and stretched my legs towards her, our thighs touching.
My sister trembled and rubbed herself against me forcefully. I felt my genitals immediately swell, my whole body burning and uncomfortable. I whispered in her ear, "Will you come over when we go to sleep?" She gritted her teeth and slowly nodded.
Finally, my parents turned off the lights and told us to go to sleep. I lay in bed and heard my father's snoring begin. I tiptoed out of bed and climbed onto my sister's bed. She wasn't asleep either; her nostrils flared as she breathed rapidly.
I lay quietly beside her and reached out. I slipped my hand down into her underwear and gently touched a small protrusion along the slit. My sister suddenly trembled all over and squeezed my thigh hard. I was even more excited, constantly playing with her nipples, while my other hand went to her chest, grabbing her newly developed breasts, no bigger than walnuts, and squeezing them hard. My sister immediately bit her lip, her hand reaching into my underwear, grabbing my penis, and twisting it forcefully. My penis, already throbbing painfully, felt it absolutely needed to release.
I rolled onto my sister, slowly pulling down her underwear, and desperately rubbing and pressing my swollen member against both sides of her vulva. My sister probably couldn't hold back any longer, arching her back and twisting wildly in rhythm with me.
Suddenly, it seemed to slip inside, and she let out a soft cry, reaching out to wrap her arms around my waist.
I felt the entry point was very tight, my penis was squeezed painfully, but amidst the pain was an intensely itchy pleasure. I tried to slowly push forward, when suddenly a sharp pain shot through my shoulder. My sister had bitten my shoulder hard, and tears were streaming from her eyes.
I dared not move again, but my penis inside was throbbing violently. I tried to pull it out, but the hands around my waist tightened, preventing me from leaving. I couldn't bear to let it go, so I just swayed back and forth inside.
After a while, my sister's breathing intensified. Even with the light off, I could see her face was flushed, and one hand kept grabbing at my buttocks. I was also unbearably throbbing, and I felt that only by continuing forward could I relieve the discomfort. I forcefully lowered myself, pressing my sister's head down, and used my tongue to find her mouth and enter.
It seemed to encounter some resistance, but I didn't care and thrust in all at once.
She let out a whimper, her small mouth sucking hard in mine, her teeth biting my lips desperately, and her long fingernails digging deeply into my shoulders.
Despite this, I felt incredibly satisfied. My penis seemed to have reached its peak, and I felt something wet on it, while I smelled a faint scent of blood in my nose.
The hands that had been gripping my shoulders gradually loosened and slid down to my waist. My hands, however, grasped her small breasts, and my body began to slowly undulate up and down. My sister's waist began to move in response to my movements.
After about three minutes, my sister's insides began to spasm, gripping my penis tightly and loosening, as if a gush of fluid was gushing out, completely enveloping it.
My sister's tense body relaxed, and her hands slid down from my waist, leaving only her tongue sucking in my mouth.
At this moment, I felt a tingling numbness in my lower abdomen, and my penis began to tremble violently, ejaculating a considerable amount of fluid.
Then I collapsed onto my sister, who pressed my head tightly between her breasts, her lower body gripping my penis, gently swaying, making sobbing sounds that only I could hear.
I just kept panting, feeling both satisfied and afraid, constantly thinking: Is this incest? Will we be discovered? If we are discovered, I'll be beaten to death.

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My experience with my sister

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