What Almost Made Me Cry Today: “My Sister’s Keeper”

Look, I knew what I was getting into when I plugged my headphones into the armrest on Delta flight 560 from St. Lucia to Atlanta. “My Sister’s Keeper,” starring Abigail Breslin and Cameron Diaz, is a classic weepie, the adaptation of Jodi Picoult’s novel about a troubled family whose younger daughter (Breslin) sues her parents …