answer:The only thing to do is make a clean break. In the case of his parents, presumably they managed to stay alive as functioning human beings long before he ever existed, and certainly long before he was able to take care of them. If they can pick up the phone to call him for a ride, they can just as easily phone a cab. If you choose to break contact with your son, that will also have to be a clean break. Inform him exactly what your terms are for resuming contact, and stick by them. No, it will not be easy. Yes, it will be emotionally draining and very difficult. Yes, you can do it. You don’t have to feel guilty. You do not deserve the abuse, you are not obligated to put up with it, and you do have the right to choose who you grant your precious time to.