re: Anyone else not on speaking terms with a parent?

I have a good friend who hasn’t spoken to his mother for years. Totally cut her off from his life and from seeing his kids. The Mom actually brought a lawsuit against him, claiming she had a right to see her grandkids. The best she got was a phone call once a week. This was a few years back, so not sure if she still gets the phone call, all I know is, my friend’s Mom is still dead to him.