SAY SOMETHING NOW. Don't wait. I've had a bil who became obsessed with me when I turned 18 (I guess in his mind that was an "okay" age for him to show me inappropriate affection). Every family gathering was very awkward. I kept waiting for someone else (my husband, my sister) to speak up. I felt weird about saying anything.

I am now 51 and my bil is COMPLETELY obsessed with me. He regularly comes into the cafe where I work...my co-workers finally asked me if "that guy who comes in here all the time is in love with you?" Ugh. Uh...yeah..."that guy" is my brother-in-law! My sister doesn't particularly give a hoot - she flirts with other men all the time.

Please, don't abuse yourself by allowing the totally inappropriate actions of your bil continue. Because it will. And no one will step up to help you out - but they might end up blaming you.