123 you said in your post that he shouldn't take the burden of pain and responsibility on himself? That she should take some of it? Shouldn't she do more than that? She is the one who cheated numerous times. He was simply trying to get at the truth. As were you. There is no blame in that in my mind.
Also, there is no room for dishonesty in any kind of relationship. Not just a mono/poly one. Not just a poly one either. Cheating is cheating. Dishonesty is dishonesty. It isn't welcome anywhere I would think.
Anyone want to be friends on Facebook?
Send me your name via PM