I really love Brun in this. In her straightforward way, she really is concerned about Clinton and wants to help. "You have to be honest" is her way of saying that she really wants to help but that he has to open up for her to do so. She has a different way of handling the universe than most but, in the end, her reactions are human and, frankly, sweet by her own lights.
I kind of feel sorry for Clinton. I think everyone has a story of the asshole close family member that they prefer not to think about but this one is, as I said yesterday, clearly one that left scars that aren't going away any time soon.
I also wonder if Mr A will be making a return at some point, maybe to object to Claire's engagement simply because he wants to continue to exercise power over his children's happiness.