I mean SH in character would do this. OOC SH, like the one in the scene as it is, has no backbone. They came up with a way to justify her not caring as much as she should have, by adding all that crap about sharrans and casual sex. It contradicts the earlier stuff.
So they won't change it, because they don't want to punish the player for having sex, with disapproval... though they do punish you if refuse to have sex with Halsin. But these scenes don't really matter I suppose, because once engaged in them you are no longer following reason anyway. It's just porn.
I do think that ending scene where you're mean to her should be altered though. This is in character SH and should reflect that. Like she could say, "I'm hurt that after all the times you said you wanted me, loved me, you chose to do this. But if you change your mind, it will be easy to find me."
I can't imagine why anyone would want to break up with her though.