DEAR ABBY: I have been married 35 years. During the last six years, my mom died, my dad moved in and then he passed away at 91. Dad traveled, including to see my three siblings, and had a girlfriend. Three years ago, my mother-in-law, who is in the beginning stages of Alzheimer’s, moved in. My husband is an only child and has no other family nearby. A couple of years ago, our sons, both of whom are in their 30s and had been in the Air Force, moved in. They have steady jobs and contribute to the household. One just ...