Do what is best for you. If you think that in 20 years you won't regret giving her a chance, don't bother. I would simply have someone tell her to write you a letter and when you are ready to read it you will. If you're never ready, that's okay. It is your choice. If one day you are curious, you can read it.
I have a huge rift with my mother that I doubt will ever be overcome. One of the reasons I was willing to move across country was to get totally away from her venom. I will call her on occasion to see that she is okay but that's about it. I will call her because it is the right thing for me, not because I have to or because she wants me to.
(((((ALYSSA)))))