My mother-in-law and father-in-law own property in Texas, which has been paid off for a long while. My father-in-law is in a nursing home with advanced Parkinson's disease. My mother-in-law has my father-in-law's Power Of Attorney, and my wife has my mother-in-law's Power Of Attorney. My mother-in-law desires to add my wife's name to the deed/title to their property. What is the best approach to accomplish this? Thank you.