Bryan.....
I admire that you are so thoughtful given the circumstanses with your Mom. But you are all the better for doing it. Not everyone can(I understand that to)....but I do think it can chip away at you when you hold onto bitterness and anger/resentment(even when we have a right to-some more then others)I try to always do what I think is right-it isn't easy but it helps me live with myself. You are a good son and I hope your Mom fully realizes that even if she can't express it.