It was two weeks ago. Me and my cousin are staying over my uncles house. We are both 13 so we were playing xbox kinect she was playing wipeout. I was trying to watch the game but my eyes kept sneaking peaks at her a*s and t**s. They were bouncincing like crazy and I could not help but get hard. So once she fell asleep I went to where she was sleeping and started to touch her t**s and a*s after a while I had to jerk so I stood over her and started fapping . I was about to c*m when she rolled on to her stomach. So I slowly pulled down her panties and stuck my d**k in her a*s. I was moaning and I ended um c*****g in her butt . The next morning she text me and said she knew what i did. So I asked her if u knew then why didn't u stop me and then she asked me to come back into the room and I refused then she said "I'll pretend to be asleep again"