At the school gates, Faiza fits in. It took a few years, but now the snobbish mothers who mistook her for the nanny treat her as one of their own. She's learned to crack their subtle codes, speak their language of handbags and haircuts and discreet silver watches. You'd never guess, at the glamorous kids' parties and the leisurely coffee mornings, that Faiza's childhood was spent following her parents round the Tooting Cash'n'Carry. When her husband...