I would throw it out and try to forget about it. This isn't a peace gesture - it's another way of her telling you that you are wrong. My father does the same kind of thing, bringing up times in the past where he sacrificed himself that one time by doing something that any parent should be doing anyway.

There's a lot of guilt that goes with cutting off an unkind parent, but how many times do we have to give them one more chance? I also grew up in very bad conditions due to my father's narcissism and substance abuse. Maybe it's not all his fault that he is the way he is, but he made really self-serving choices for himself when I was a kid and he continues to do so now that I am an adult. I can exercise my own right to make decisions that work for me and my best interest, not his.

Anyway, you are not crazy - that is a crazy making package your mother sent you, like the globe for Christmas.