Dear Calpurnia I know a bit about what you are going through because my mother was diagnosed with terminal cancer and we were told at diagnosis that nothing could be done. I collapsed from the shock that day, I literally folded in half and fell to the floor, it was like being punched. I then had to pick myself up and stand with my siblings to support my Mum, the hardest thing I have ever done. She swung from acceptance to complete denial and we had near on another two years with her.
Looking back, it was a very special time and I am grateful for it, as hard as it was. When she was in denial, we just went along with it, e.g. "planning" a holiday a week before she died. Then at other times, she would talk to us about when she would no longer be with us and we could say our goodbyes.
I don't know whether you are a reader - I find reading therapeutic. I've just read I Found My Tribe by Ruth Fitzmaurice, a young mother of 5 children whose husband is diagnosed with MND. It is the most joyous, uplifting book I have read in a long time, a chronicle of how she dealt with his impending demise in a life-affirming way. Google it, it is a fantastic book.
xx