I have been dating a girl for 3 months who is so far a really good girlfriend other than the fact that she has a bit of a reputation as a slut. I knew that she had sent pictures to people before we were in a relationship but I learned that she sent a video of her masturbating to someone, also before we started dating. It just really disgusted me and I brought her home immediately and told her we were breaking up. Am I overreacting or is it reasonable to break up with a girl over this?