I think it is a crazy idea, but my parents are letting my 17 year old sister's boyfriend live with them. They make him sleep in a separate room, but it strikes me as kind of strange. Anyway it doesn't take a genius to know what the two of them are up to when no one is home. The thing is I've taken to sneaking over to my parents house and spying on them. It started out just listening to them fuck in her bedroom, but now I've gotten to see all sorts of stuff. When no one was there I ended up just bending a blind on my sisters bedroom window so I could be outside and peek in on them. It has worked great! I love standing there and watching my sister suck this guys cock or getting fucked hard while she is bent over her bed. Its kinda weird since she is my sister, but it is such a turn on.