Marj Morris was your ideal mother. The school principal knew, Marj's kids knew, the other parents knew. She went to all her kids' sports fixtures, managed teams, turned up at the prizegiving ceremonies, never missed the parent interviews with teachers, did the late supervision shift at the discos, baked endless cakes for fund-raising fairs... on and on it went. You could set your clock by Marj. And she never complained, a...