My mom kicked me out when I was 18 and I was homeless for 2 weeks. She took me back in when uni started.

This is one of the reasons I don't speak to hear anymore. At all.

This year, she sent me texts demanding to see me on my birthday. I did not speak to her. At all.

I am now waiting for her to die and for one of my siblings to inform me. Apparently, my sister (who lives in another country, we don't talk much) is also done with her and doesn't talk to her at all. I guess our brother will let us know.

What I'm getting at is that you are under no obligation to cater to people who don't want to tolerate you in the first place. If a guy you lived with for a while was an asshat and demanded to see your children, you'd think he was demented. But suddenly he nutted in your mother once and now it's fine? Family means nothing on its own. Family means you have a default group of people you interact with, but it's up to each individual to actually be friends and allies with their family members, and if someone isn't being a good friend or a good ally, and even is actively antagonizing you, then why do you still feel like you owe them anything? What do you mean "finally getting to the point you should accept it"? Accept him into your life? Why?! What good will that ever do to you? Oh sure maybe you'll get to think "well I made amends before he died" once he's dead. Guess what, if you've never held a grudge against him like you seem to imply, then it's actually not up to you to make amends. Don't tolerate bullshit from people just because they happen to be related to you.