My sister's been acting strange recently whenever I bring over my girlfriend. She goes out of her way to be nice to her, sometimes it even seems like she is flirting. I don't know what is going on, but I left them alone the other day for a couple hours and when I came back, they were both giggling and sweaty. If I didn't know any better I would swear they had been fooling around.

R. Anderson at 21541 Blythe Street Canoga Park, CA 91304