I think
Gregoris has a point, Haley is emotionally dependent on her brother due to trauma.
To take advantage of such a fucked-up situation to get carried away and fuck her is morally questionable at least.
Yeah, she loves him and all that, but remember how she is a victim here, trading sex for emotional support can be her only way to have some peace of mind.
I have three paths, solo-Haley, Sandra-Haley and Haley-side chicks. Solo-Haley is just the one I like least and I hope that in the end Haley can remake his life without his brother, although I doubt it seeing how
she just broke with her boyfriend.