Is it normal that i had sex with my ex girlfriends sister?
About 8 months ago I began dating this really nice girl. We had a great relationship and I even met her parents. Her dad really enjoyed my company and We even went to the first home game for the atlanta falcons together. I noticed her older sister was nice and was very attractive. I only saw and talked to her at my girlfriends family partys. I didn't have a strong interest in her. Well the sad part is about 2 months ago my girlfriend and I began experiencing problems. We kinda broke up but still talked and hung out. Two weeks ago she got really mad at me over not attending her best friends birthday party.
This was after we kinda broke up and then she completely stopped communicating with me. All over me not going to her friends party that I didn't even like. I then ran into her sister at her workplace (her sister is a waitress at a restraunt). I went there because I wanted to see what was up with my girlfriend. She saw me and there and came over and was talking with me and apperently knew about the situation and told me to go with her to her apartment after her shift and she'l talk to her sister and fix the problem. When I followed her out and when we got there as soon as that door shut she was all over me. She was making out with me and tackled me onto the couch and aggresively took both our clothes off while keeping her tongue in my mouth. I couldn't even fight back and then we had sex for a couple hours ( I stopped resisting). She was incredible and was violent and increbibley passionet in bed. I was confused and felt awfull and I haven't told anyone about what I just did and I need help. So is it normal I cheated on my girlfriend even though we weren't technically together? I'm really confused and guilty