My son is an only child. He's 5 1/2 years old. We homeschool. He talks back, argues, and is better than price line negotiator. He wears me down and I need help with getting to him to realize that no is no, and that I mean what I say and say what I mean. I know that I'm the problem. Please be honest and tough. I can take it. Tired of being a door mat and dealing with a boy who could work for Priceline with his negotiation skills.