I never said she was poly. However, she shows feelings for Karlach and definitely a sexual attraction to Halsin (I've read that on act 3 she got nasty banters with Wyll but I haven't see it). But that doesn't make her poly. If you take a monogamous path with her, you can still stumble upon the twin scene and if you got Halsin on your team (and meet others conditions). Well, all I can say is 'enjoy' the view. lol.
It would be nice if at some point in the adventure you find, I don't know, a painting of an orgy and she reacts to it and let player know she approves those situations. Or better yet, let her know if you're into those things or not, and that way, avoiding they drow situation.
The Karlach situation was in act 1. There's no romance yet, nor did she disobey Shar yet. The only act 3 dialogue with Wyll I remember is her taking the piss out of him regarding devils to the point that he calls her one. Was actually quite cruel.
And yes, I'd rather it was a player choice, than have them rewrite her to full on poly like Halsin is right now. Though it'd still make no sense anyway, she wants to go be a hermit on a farm with you (and her parents if you didn't disenchant them), yet she's okay with sleeping around for the sake of it? Doesn't sound right to me.
