I don't think it's possible to really feel the enormity of being a mother until you realize that your child knows you exclusively as "Mom." Hayden is going to be three in February, and to him, I am and always have been the person trying to teach people to use the potty, persuading others to eat food they don't want, announcing bed times, and hauling people away from the park. I'm sure he assumes I've always used phrases like "Chew up those grapes before you do another somersault" and "We don't wash our hands in the toilet."