I also believe that the best course of action to fix Shadowheart's character inconsistencies is to remove everything related to the orgy/poly relationship with Halsin. She has displayed a kinky side to her in earlier acts for sure (Abdhirak whipping you, mentioned being tied up with some rope), but that shouldn't mean that she's interested in orgies. Halsin should be the only one that's able to do the drow twin orgy with you, if anything.
