My mother was very depressed about me DAing but then my mother was depressed her whole life. Nothing I said or did ever helped her. She wouldn't get professional help. She reacted by shunning me and having nothing to do with the child I had six years later. My daughter could have brought her so much joy. She was dying in hospital the only time she asked after my daughter, who wasn't there, she was at a birthday party.
So be aware if you DA your JW parents may shun you until they die. Sorry to be so blunt but it needs some serious thought. For me there was no choice.