My Friends Brother

My friends brother often mistakes me for his other brother and when I spend the night there sometimes my friends brother tells him to go to his room but leaves me sleeping. One time I fell asleep in the living room and his older brother and girlfriend snuck in. They were watching a movie for about 20 minutes when she started to suck his c***, they both thought I was asleep, and then it led to them having s** on the sofa, with me secretly watching them the entire time.