Your Sister’s Sister is a movie about a guy who sleeps with his best friends sister. It is a rather strange love triangle and it leaves a few unanswered questions which is a little annoying. The movie drags at times and really didn’t live up to it’s full potential in my book. If you really want to see the movie, wait until it goes to Redbox and rent for a $1 or put it in your Netflix queue. Don’t waste your time going to see it in the theater.