H.D.
I have had 2 kids and gained 40+ with both pregnancys. After my first, it took me a long time to get my body toned down to something like it use to, but I never lost all the flab. I have a ton of stretch marks as well. I did the whole cocoa butter thing, but it doesn't really work IMO. Now after my second child, I can't seem to loose any of my belly flab like I had before. I have grown to love my stretch marks. I say they are the gift that my kids gave to me for giving them life. (That and a bigger bra size.)
I have a friend who, after 2 kids, has the same size body that she had in high school. It took her a few weeks after giving birth to get it that way with no help. Kind of makes me want to puke, but thats just the way her body is. Everyone's body does something different after giving birth.