Lia, a sister delight

Lia and I are two years apart, she's older than me, we've always shared things, young still she's got a boyfriend, a little older guy, I got jealous, but she seemed happy, whenever I came out of the street they were chatting in the car, but a night of rain I went to make fun and scare them, and when I got close to the glass that got scared I, my little sister was with the guy's dick in her mouth, and when she saw me get scared, I think she choked and bit, I know, the guy got pissed at her, he started yelling at her, I didn't even think much, I opened the door and dragged the guy through the asphalt, set a mess, friends saw and when the guy was gonna react, he got hit the crowd. She ran inside, and the next day I heard my grandmother gossiping to a friend that the confusion had been because the guy had tried something with Lia, and she asked for help and the guy got hit, and she knew that Lia had the balls of the guy in her mouth. Anyway, after that we spent a week just talking to each other, until the invitation to my uncle's place arrived, we would spend five days there. When my cousin got here, he came to tell me that he was dating a girl from the country, and my cousin came all sad saying that now that her brother had a girlfriend, she was alone, and since she was always loving me, we're the same age, stuck to me all day. On the first night there, my cousin went out to date, me, Lia and Ju, my cousin we sat there, until she suggested we go to the creek, the moon was full, we walked through a forest and suddenly my sister said she needed to go back, something she ate had sourd her, ran back, we still watched her until she lost sight. We arrived at the creek and Ju, in a short dress, put the feet in the water, called me and sat next to her, and she all sweet put her hand on my leg, played and put it on her, we stood there talking about something until she asked if I was dating, said no, that I was with a girl but didn't roll, the family caught on foot and such, she said that there was a boy who kept wanting something with her, but she didn't know how to behave, and I played: well, I can teach you! She laughed, she turned her face to me and closed her eyes, I went easy and I gave her a little stamp, I felt her arms shiver. But I did say it wasn't like that, we went up to some trees, hugged her and kissed her mouth again, she trembled, knew it was "wrong", and hugged me harder, I calmly explained the kiss, and soon that delight kissed me with all affection, I felt her body and she left, and as instinctively took my dick, felt and smiled. She was very comfortable with the situation, I was squeezing her body, touching her titties, and she had her hand on my dick, until I lowered the strap of her dress and a tit jumped out, sucked him with affection, she shook and put her hand between her legs. I took the other one off and sucked it good, took her hand off and put mine on her panties and went playing with her fingers, she leaned on me and in a few minutes shook, her legs bambed and she walked away putting the dress back on. She rushed out in front of me and dumped me there with her dick in her hand. I'm all set to eat that little treat. I jerked off right there, washed myself in the creek and came home. Everyone had already gone to bed, I still passed the room where she and my sister would sleep, but everything was out. My cousin came in at dawn, fell on the mattress and passed out. I couldn't sleep, I went to drink water and I got scared, my sister came out of nowhere, with a light dress, said she was hot and we stood there. I mentioned going to sleep, but she said she wanted to go outside because it was cooler, we went and stayed on the porch enjoying the breeze, and that's when I looked at her body for the first time, not that I hadn't seen it before, but there, the shadow of her breasts through the fine tissue, her exposed thighs, and that little mouth that I knew I had already sucked a stick, I got hard again. She realized I was upset, and she said: wow, this Ju is sticky! I laughed and said she was cool, and to my surprise I heard: I know, you rub yourself in it and when uncle catches you fuck!!! I didn't know if she'd picked something up, I couldn't ask, but she surprised me again, grabbed me by the hand and went down the road to the creek again, she sat on a log, asked me to sit next to her and said: Jay, I saw what you and Ju were doing, she's too young, and from what I've seen, you have a big dick, you don't risk it because you can hurt her! I'm super lame, with my dick giving me a sign of life because she told me she saw it, but not knowing where that conversation would go, filling me with courage said, and what do I do? She keeps rubbing herself, I can't cut her, it gets boring! She looked at me with a dirty face for the first time and said, "Quiet, I'll teach you, but you can't flag. I was really surprised now, would my sister teach me what exactly to do with my cousin????