Do not leave your child unattended in the bathroom??

OK. So we've always heard that you shouldn't leave your kids in the bathtub unattended, right? I have a new rule to add. Never leave your child unattended in the bathroom. Last night The Dad was filling Kate's humidifier in the bathtub. He took it in her room and then heard a thud and crying. Kate loves to take a bath and apparently thought it was bath time. She swung her foot over the side of the tub, leaned over and fell in. I now realize she needs supervision anytime she is in the bathroom, not just when she is taking a bath!