Dear AdviceMama, My 4-year-old granddaughter is the victim of my daughter's yelling, profanity and name-calling if she doesn't listen. They live in my home, so I am a constant witness. My granddaughter is now becoming the class bully in preschool. ...The number one most powerful influence on our children's behavior is how we ourselves behave. Gently offer to help your daughter find healthier ways to handle her child when she doesn't listen.