Great-great grandparents sounds so remote, but it’s really not. My grandmother’s grandparents, Charles Ambrose and Mary Mackin Plamondon were killed when the Lusitania was torpedoed 100 years ago this week. It was their wedding anniversary that week, one that by all accounts they celebrated with great tenderness. My mother was enormously close to her grandmother, Charlotte Plamondon Ripley, and these were her parents. Lolo, as we called her, was 32 when her parents died, a young mother. Her sister Marie was 34, Blanche was 29, Charles was 25 and Harold was only 23. Here’s a photo of Mary. She looks…