Sarah’s mother, Evelyn, is a woman who makes “over-prepared” look like an understatement. She pulled up in a large SUV, and she wasn’t alone. She had hired two professional servers to help her unload.

As Evelyn stepped out, she looked at the rows of food the other guests had brought—the casseroles and the pies Sarah had been so proud of—and she made a face like she’d smelled something rotten.