Originally Posted by
Gigabitch
I'd say he crossed the line, not her. I still think the conversation was inappropriate, but she's not setting up a cheating situation, even if he would happily let it go there. The only think she did wrong was to fail to shut him down completely.
Just keep your eye on her. She shouldn't be alone with this guy, but it sounds like he's with someone else anyway.
If I were you, I'd tell her the guy makes you uncomfortable because you think he still wants to get in her pants and you think it's weird for her to continue a relationship like that. If you were actually engaged or married, you'd be well within your rights to insist that he get the boot but right now, just give her a hint.