Ok...I need some help. I had sex with my best friend's brother last night. She is really upset with me and I am not sure why. He had been coming on to me all night and when I said something to her about it...she pretty much gave me the green light to go ahead. I wonder if I took what she said wrong...I don't want to go into the whole long drawn out story, but I may have to...lol Anyway, is there some unwritten rule about best friend's sleeping with brothers that I dont know about???