My Mom, Rosa, retired from the Tucson post office in early 2022. That same spring, my younger sister Mel went back to work, and Mom started watching her kids five days a week, 6:45 a.m. to 5:30 p.m. The youngest was a baby then; the kids are 9, 7 and 4 now. She never charged a cent. Confession: I live 20 minutes away, and in four years I have never offered to take even one afternoon. I told myself Mom loved it. Did any of us actually ask?