I have a friend, she's in love with a man who is taken by another female who introduced them. Now these two ladies do not really know each other. They never chill or do anything together. Now my friend and this man have been intimate and now she had feelings for him... He keeps telling her that he's gonna leave his girl for her, she has come to me for advice and now i dont know what to tell her.

To make my case i feel like she wrong and so is he in the matter, it does'nt matter to me that she didnt know the girl very well. that girl trusted her enough to be around her man. She should have known better and her self respect isnt intact. but how do i tell her cause im blunt when it comes to the point, and i dont wanna lose her friendship so what do i do?