Mothers and daughters talk about all kinds of things. But there is one conversation Susan Beauregard, 49, of Hampton, Conn., is reluctant to have with her 89-year-old mother, Anita Shear: What to do — eventually — with Mrs. Shear’s beloved set of Lenox china? Ms. Beauregard said she never uses her own fine china, which she received as a wedding gift long ago. “I feel obligated to take my mom’s Lenox, but it’s just going to sit in the cupboard next to my stuff,” she said. The