It is really tough to deal with an ailing parent, and to worry about what might happen to the one who remains. (Hugs). Been there, done that, happy to listen to you talk about it. I hope that you can take some comfort in the fact that your siblings are nearby-- no matter what happens, your mom won't be alone, and she will have people to call on. I also know that you take some comfort in your ability to connect with your father and see him while you can. Its hard, but its important. (more hugs).