My sister had sex with my boyfriend. I am very upset with her and am thinking...

My sister had sex with my boyfriend. I am very upset with her and am thinking about never speaking to her again. He is to blame too, but she was coming on to him so he finally gave in.

She doesn't have a boyfriend, and is trying to get mine! Should I forget about her for good?

You are focusing the majority of your anger in the wrong direction. You sister was as wrong as 2 left shoes for sexing your man, BUT... he was wrong too.

Understand this. You will know your sister all of your life. Boyfriends come and go, that's why you're with this boyfriend, and not your previous one.

Forgive your sister, forget your current boyfriend. If he cheated once, there's a huge possibility that he will cheat again. In this day and age, don't go for that --- no can do.