Lots of people unconsciously are unaware of their own self . As a result, she blames others for her own failures. An example, girl X is cheating on girl Y. X blames Y for cheating on X. When the truth is reversed. It's very common. I hope I shed light on trials of relationships. Please feel free to comment. Thank you.
I've seen and received it. It seems that once you do smn 'bad', especially when you hide it well, the reality hits that it can be done. If you did it, someone else might and that, due to guilt perhaps from paranoia, it might be done to you. Since the people ur close to have the greatest ammunition to hurt you, you might distrust them more.