When I was about 7 (m) me and my sister (5) had just gotten home from church and were playing doctor like young kids do. We were playing in a fort that we had made and something came over me and I pulled down her pants and started playing with her tiny little pussy. First with my fingers just exploring that tight little cunny slowly I worked up the courage to start licking it tasted so good I licked it for almost 10 mins until she wanted to touch me my little cock got so hard. She slowly stroked it until pre-cum started cumming out. I then layed her on her back and thrusted as hard as I could inside her I didn't last long before I started to feel my lil cock start to pulse then what felt like forever I came so deeply inside her tiny little pussy. I still think about it all the time. We continued until I was 15 best sex I've had mainly because of how taboo it was