It a very hard thing to be estranged from parents and kin. You never stop wanting that sense of home we innately feel is missing. I know that feeling. I was estranged from my mother for a couple of years. But, we were reconciled a bit over a year or so before she passed. It didn't really fix things, but there was a resolution in that I made space for it.
I'm glad I did for my own peace of mind. However, I admit I did it because it was expected, because I was repeatedly given the message: She's your mother and because she gave birth to you she deserves that you do this.
Still, on her deathbed, she did admit she was wrong sometimes and that had hurt me, and she apologized.