Marco Vitori is very good at his job. He is less good at 3 p.m.His daughter Maya has learned to wait — standing at the classroom window every afternoon, watching the car park, counting the minutes until he arrives. It isn't neglect. It's the mathematics of a man trying to do two people's work with one person's hours. Three years a widower, and his grief still shows up as a scheduling problem.Ivy Azzurra is a kindergarten teacher, and she notices things: the child who waits ...