I agree with this. Why be friends with his daughter? What is the gain in that? It was twisted that you had an affair with this man, but having relations with his family after the affair is over is twisted as well. But people who get into the excitement of affairs are bound to stir up more drama sooner or later. Perhaps the reason why you are so eager to hang onto a part of him, even if it's his daughter may subconsciously mean that something inside you still craves that excitement and thrill of drama.Stay away from him and all his family. You should have no contact with any of them. Do not be friends with them, do not reply to emails or text or phone calls.