In the past couple months my father's relationship with his parents and siblings has quickly and dramatically deteriorated. I've tried to ask him if he would still like them invited to the wedding (my mother has already given her strong NO opinion) but he avoids talking about it. From what my aunts and uncles have done to my father I will not be inviting them but I don't know what to do about my grandparents. My father hasn't talked to them for weeks but I'm the first grandchild to get married. I've set their invites aside because the rest of them go out this week. Any advice on etiquette or personal experience would be greatly appreciated.