Hello Rick; sorry for the confirming diagnosis. My husband is in his early 50s and has 4 kids, all grown except one who is 15. Kids follow our lead in how to deal with things, so if you and your wife can remain calm and find the humour your kids will as well. When my husband's 21 year old first came to live with us she was in tears a lot. This is of course understandable, but eventually she noticed that we were determined to keep on living life as fully as we could, and was initially shocked at our humour. But now she is taking it in stride and is getting on with her life, and cracking jokes herself. When his youngest comes for a visit he takes him for walks, on trails and down by the lake with binoculars and a plant book of north america, and a bird book and they search things out. Life isn't over yet, it is just different. I hope that your progression is slow, and you have many adventures to come.
Paulette