My 7-year-old son has started lying to me about little things, and he's begun to hit me in anger. His father and I were divorced three years ago because my ex-husband became violent. After we left, my son and I moved and I married again. We have recently moved once again, which may be part of his problem, but he's too young to acknowledge that something is bothering him. How can we help him when we don't know what's wrong? And how should I handle his behavior?