If there was a good chance they would get up and walk around to the other side of the couch (which there probably is), then no. I don't fancy getting caught screwing my boyfriend by my mother or father, and definitely not by a family friend.

Would you ever have sex in a rented halloween costume that you had to return the next day after getting semen/other sexual fluids (like female ejaculate) on it and still return it when it was due (as opposed to buying it)?