Mike, this a right of passage, and there are several that you cannot ever be prepared for, but you will learn to handle.
I remember the first time I saw my father using a walker, but it was I who was most staggered at the time. My omnipotent Dad was mortal. It was devastating to me.
During that time, both my parents were were very ill, for a couple of years. I don't see it as a good experience, but in my eyes, it made my older brother into the man he had hoped to be. Both of us weighed in and cared for them, their affairs. It's a difficult task that will better you in a number of ways, by day's end.