Watching this kind of thing happen is ALL of our worst nightmares.
I'm really sorry that this has happened to her (and you), and the Missus and I will keep you in our prayers.
For what it's worth: I had a friend "get the long face", from his Doctor, and it was already in the end stages...
He vowed to leave nothing on the table.
For six years: He rode ATVs, snowmobiles, and motorcycles. (He even restored a couple of old Sno-Jets along the way.) He and his Lovely Bride hosted family dinners every week, and he watched his grandkids grow up.
Don't leave anything on the table!