DEAR ABBY: My 40-year-old daughter, “Marta,” and I are widows. I’m retired, and my daughter has a small home-based business. She and her three children live with me. Because the cost of living is high in our city, living together has allowed us to pool our resources and co-parent my grandkids. Marta has had a boyfriend for a year and a half. I have not warmed to him. He has four kids by a previous girlfriend or wife. The youngest is 18 months old. He works at a grocery store, and I just don’t see a viable future for my ...