Recently my friend Mary helped her elderly mother move from a neighboring state to an independent living community located near where Mary and her husband live.  In an e-mail exchange about the challenges of caregiving, Mary noted, “I worried very much about taking on this responsibility, but I have to say I am glad we did, for many reasons. When we were talking about moving her here, and I was expressing my anxiety about it, my sister-in-law, who nursed her mom to the end with cancer, said...