Selune isn't Sune or Sharess, but there's no indication she's monogamous either. Aylin never mentions her father, and I bet she has half siblings.
Shadowheart's behaviour implies that she is monogamous. She will deny any poly offer in act1-2 and act like she only needs your character anyway(specifics you can check in first post of this thread), selunite Shadowheart that is. Its almost like she got shoehorned into all that stuff with Halsin(I think devs knew that majority of players will redeem her anyway or didnt separate shar/selune route for her or they forgot or it may be even bug).
