Having children does a number on your abdomen--and although you can help things by doing toning exercises, it's important to do the right ones. Check over in the Exercise Forums to see whether anyone has some tips on this.
As for fat deposits aside from that--I have always carried my fat on my abdomen, and even now, I can see that another 20 pounds of fat is still there. It will shrink as I lose more weight--but there isn't any way to reduce a specific fat deposit (short of surgery or liposuction, which I don't think I'm going to have). But--I have never had a flat, boy-like abdomen as is popular now. I always had a nice pad of fat around and below my navel, even when I was 125 back when the earth cooled...
I don't know what that comment about waist measurements over 35 means. My waist is currently 39 inches, even with all the abdominal exercises I do. Oh well.
Jay