DEAR ABBY: My aunt had a stillborn baby 20 years ago. At the time, I was a teenager. Ever since then she has lived a morbid lifestyle – like you’d see in a scary movie. After the first year, she threw a party with a cake for all of us, and wanted us to sing “Happy Birthday” to a baby that never lived. When my grandfather died recently, she made sure the preacher announced that my grandfather also …