My boyfriend's sister?

My boyfriend's sister used to be cool but in the last year and a half, she has turned into psycho hose-beast control freak. She has issues with her boyfriend and she brings them into our house every time she comes over, so by default, we become part of the problem. She is very insecure and weird. And everyone has to be careful what they say around her because she is so sensitive. Well, the last two nights I have been hanging out with my gay friend. We've been friends for fifteen years. While I was with my friend, she and my boyfriend got together for coffee. When she asked where I was and he told her that I was with my friend, and she was apparently appalled that I had hung out with him two nights in a row. She said "It's a good thing he's gay, or else you might have something to worry about." My boyfriend found this very offensive on a few levels. When he told me that, I found it very inflammatory, seeing as how she knows nothing about my friend. I'm also offended because (cont...)