I'm just trying to justify her behaviour with all we have right now, I'm not implying this is true, because I too think that she acts out of character and I want pure monogamous relationship with her. I'm just trying to point out that she is AT BEST monogamous that ok with open relationship. Not poly.
It's already justified. By fact that it is inconsistent, which is a completely valid - albeit very unfortunate - justification. There is no other justification to be found. She's not okay with open, and definitely not okay with poly, but Halsin isn't even poly, so there's no such thing as a poly relationship in the game anyway.
