This is it, isn't it? He was family until he came out, then he's not - but up until that time he was the dutiful son and that has stuck with him.
He was a dutiful son, but was never recognized for it, well before he came out. I wonder why his parents always favored his brother? His brother is an unsuccessful, spoiled, entitled, brat and a direct result of his upbringing. Is there something we don't know about James' biological parentage? There has to be some reason for their terrible treatment of a good kid.