Every mom has her embarrassing days; some are just brattier than others. "I often wonder if my daughter is the most misbehaved kid in the world," says Jennifer Gustafson from Darien, CT, mother of Lyla, age 3. "She goes from the sweetest girl to Satan in seconds when she doesn't get her way." For example: "If she says, 'Mommy, I'm going to jump off the roof,' and I don't let her, she's going to kill someone and it's usually me." Jennifer has been kicked, bit and scratched by her adorable yet, menacing toddler. Bratty? Maybe. Just being a 3-year-old? It's that, too. When Bratty Behavior is a Problem