Those are good points J. I don't think I am angry with her and I know that I have acknowledged and accepted by role in the demise of the MR.
But I don't feel like putting any effort for Mothers Day and her birthday. Kids do stuff at school for Mothers day so that's covered. For her bday, I don't feel any reason to do anything. Now, is it because I am angry? I think it's more like she wanted a S, and so that means that I am done and the cord is cut. She's out of my life except where it intersects for the kids.
I do see your point about doing it and what you did for your EW with your girls - you've unlocked the next level of zen detachment I hope to get there some day.
But, I think even though I am not angry, I might have resentment towards W for just throwing everything and not giving it another chance. I thought as a partner, you at least deserve that - but maybe I have unrealistic expectations and you're not entitled to anything in any relationship. Or is that too cynical?
Your W did pretty much the same thing as mine - no second chance for anything. How did you deal with that? Don't you have some resentment over that?
I hope to get there some day. 
