How do you deal with death when it is hanging in the room, just mocking you? His grandfather had cancer but we didn't get to see him after he went to hospice, it took him in a quick couple of weeks not months. My only experience with death has been unexpected (heart attacks, accidents and murder) I do not know how to help him with knowing it is coming.
Perhaps a change of attitude ? Instead of "death mocking you" perhaps embracing the idea that every one dies at some point, and that it IS inevitable? Work with the family, as stated, to get affairs in order and to celebrate the life that has been lived. Death doesn't have to be a horrible finale, it can be another ( big) step on the road of life.

I.