What To Do, What To Do

Here is my dilemma. My kids are getting fat. Now, before you start yelling, I would NEVER tell them that. I grew up with parents who continuously told me I was fat and needed to lose weight. As a parent now, I can understand that they meant well, but I also know first hand how much it hurts. Anyway, I was going through clothes for school. Had each kid try on everything in their closets. Ryan has always been stocky, and only grew out of few pairs of pants. Brandi is still wearing some 4's., all the 5's fit, and a few of her 6's fit now too. I don't know what to do with Kasi. She outgrew almost everything. I'm talking outfits she got for her birthday that fit in May, don't fit at all. Most of her shirts don't fit anymore, and she can't button half of her pants. In 2 months, she has gained enough weight to not fit in anything. I don't want to make an issue out of it. She was in fitness club last year, and loved it. I think it might have been the 2 months of fast food that did it. We ate out almost everyday we were at the stand.I need to fix healthier meals at home now that the stand is closed.I need to set a better example by eating better myself.I need to let her know that it is okay to be who she is.Maybe she just had a growth spurt and I'm worrying about nothing. Even as I'm writing that I know it's a load of crap. I'm fat, Junior is overweight, and our kids are headed in the same direction. I don't want them to go through school, or life for that matter, as the fat kid. I know how cruel kids can be, and it sucks. Adults are just as bad sometimes. But that's not my point. My point is I'm worried my kids are heading down a difficult road, and I need to help them now, before it's too hard. I've struggled all my life. I know how difficult it is.So, any words of wisdom would be much appreciated.