Welcome to St Ambrose Primary School. A world of friendships, fights and feuding. And that's just the mothers.It's the start of another school year at St Ambrose. But while the children are in the classroom colouring in, their mothers are learning sharper lessons on the other side of the school gates. Lessons in friendship. Lessons in betrayal. Lessons in the laws of community, the transience of power... and how to get invited to lunch.