Sorry to hear this. I'm afraid your fears about an impending funeral may prove too true. I just lost my mother to colonic cancer -which had spread to her lungs- last month. She was diagnosed early in May. Not exactly the same, I know, but I've seen how fast things can go. .
Since you've asked him to keep you up-to-date, perhaps I might advise you to also actively keep in touch with him and his family. It'll be a great support to them.
For you: all the...