I am 23 years estranged from my father. He's 90.
He was a very selfish and destructive man.
It was incredibly hard to walk away but I realised I had to break the chain of dysfunction. I had kids, I couldnt have them around him, and I wasn't giving them the best of me because I was constantly dealing with the turmoil and trouble he caused.
I literally felt physical pain for a year after I broke the chain, to the point I got various tests done to make sure I didn't have cancer.
In that time, though, I very thoroughly and extensively mourned the relationship, the past, the father I wanted but didnt get, the charming and fun sides of him that I sometimes saw, the horrible harm he had visited on everyone whoever loved him.
After a few years, I realised that I hardly ever thought of him anymore.
But it's a bit of an odd grief, more like grief for a zombie who occasionally pops up in your life. We had some brief contact when my sister died a few years ago, he wanted to reconcile, for me to visit. I thought about it for 5 seconds, and the answer was such a resounding NO WAY that I felt at peace with it and put it to one side after a few hours.
I don't know how I'll feel when he dies. Maybe relief that I can put the zombie to rest? Maybe it'll be mixed with a distant affection and compassion for his fuckedupness.
I'm not expecting any surprise feelings, but as PPs said, you wont know until the moment comes.