Overweight daughter


Ok, so I may sound crazy, but I'm really concerned about my daughter's weight. She is almost 9 ( 54 inches) and weighs 93lbs. My husband and myself are both overweight as well and she was always so skinny up until about a year ago. I noticed little by little and I just thought it was prepubescent weight gain that would go away. I bought her a size 14 dress for school and it just barely buttoned. As a family we are going to work on improving our eating habbits and exercise routine. I'm in my first trimester so I'm hoping to still be able to loose at least a few pounds with them. Am I over thinking this or should I be as concerned as I am?