My AS told me three years ago that he doesn't need a mother anymore, and "Communication from me would not be welcome". Son is 41 y/o and doesn't talk to my ex, but I do. His dad has been battling cancer for a year, and he doesn't know. Ex let me know that he is starting the last type of treatment that can be used. He started this week, and it will last seven weeks. If it doesn't cure it he'll be sent home to die. Should I try to find a way to tell him now or after his dad dies?