so last night i was at my gfs. Whilst she was sleep I could hear a girl moaning so i went and looked. It turned out my gfs brother was fuckibg his gf (17) from behind. He didnt see me but im sure she did because she moaned louder. Then she started blowing him gagging on his cock and demanded him to cum all over her. An hour later I went to the bathroom and she must of heard me, came to me and said 'hope you enjoyed tongiht'. ;)