I can definitely see her being a key point to the story if the plan is to go a passive route in getting Elves rights.
But in real I hate religion because these type of people always have a lot to say about my kink lifestyle. Always telling me about how I can free my life from Sin and such, which to my response is normally telling them my plans for the night ;)
I just think for her story to play out right the MC needs to have a very open and honest talk about his relationships then go from there, as to continue without isn't how poly relationships work.