Spice101
Maybe if you accepted your DIL your son would follow.
Came here to say this.
He cut you off because you wanted to exclude his wife. The woman likely changing his kids diapers, teaching them the alphabet etc. Seems pretty obvious the way to show him you've changed is to stop trying to cut off his wife, embrace her. He will of course hear about this and know you've changed.
Of course, you've not changed, and probably never will, so he has a right not to have a relationship with you. Made a lucky escape imo.