Yeah that's fair. I still think her disapproval with rejecting Halsin is odd. You'd think she would care more about your comfort and consent.
Jumping into an open relationship so soon seems super unrealistic to me too. Though I suppose thise game has a lot of unrealistic stuff in it.
She wont disapprove or say anything if you change your mind about drow-twin encounter even if you say it last moment in their room, so she does care. So yes, its just Halsin thing.
