Got a tree up, but can't stop the tears

Managed to get up into the attic and bring down the smallest of the three artificial Christmas trees and some ornaments. Our son and I got a string of lights and some ornaments up -- but I managed to bump one and it fell on the floor and shattered. But my wife was always the one who took charge of the decorating, made all kinds of ornaments herself, etc., and this year she just barely got out of her rocking chair to look at the tree for a minute or two and then went back and sat down again. I don't know how much she is aware of Christmas this year and I am so scared this is the last Christmas we'll have together where she is aware at all. I'm scared she'll have to be in memory care by next Christmas, and even if she could be home I don't think she'll be aware of the holiday. I've lost count, but 40+ Christmases together and I think this will be the last, one way or another. The tears won't stop.