A friend of mine has been talking to this girl for a few weeks now. She is in a LTR of 5 years with someone, my friend called him a posh loser. I haven't met him so I can't say much about him.

My friend and this girl have been flirting during the past weeks, they had a very short kiss on the mouth and they slept together once. No sex.

They are even flirting in front of the bf and he just accepts it, acts annoyed and doesnt do anything about it.

The main point I'm thinking about is will she break up with her bf over him? To me the situation feels weird because my friend and this girl haven't really kissed a lot or anything yet for a few weeks, so it's moving quite slow. Or maybe she is looking to break up and then go to him?