How dare she

My bestfriend has been sleeping with someone else fiance like wtf she literally doesn't care that she's a side chick. I told her to leave that man alone she just not listening so now I'm hoping the woman finds out and beat both they ass and drop that loser. I really hope she gets caught and I'm honestly don't want to be friends with her anymore. She doesn't think she's doing anything wrong, and this is something not new she told me all the money she gets is from being a gold digger to a married man. Like she's seriously going to get hurt