I was 9 and my sister was 15. She had found our parents VHS porn stash. It was a regular thing that my parents would be gone for hours. My sister said she was going to watch some porn and I could watch if I wanted but couldn't tell our parents. We watched together and one thing led to another and we had sex. She sucked me and we fucked. I was shooting blanks at that age but she let me cum inside her. I was already sort of good size. I'm just under 10 inches now as an adult and back then I was probably 5 or 6 I inches. Well this became a regular thing and we would have sex every chance we got. Then she invited 2 of her friends over to "watch porn" and I had sex with all 3 of them.