I hate to tell you this but...
Pre- DS I was tiny, smaller than a 6, and had hardly any hips at all.
Post DS, 5 fucking years later, and I have still not gone back to the size I was before. I have put on loads round that area.
I swear the actual hip bones have shifted a bit, because no matter how much work I do on that area, I just get a smaller waist but the hips stay the same.
I didn't have boobs either before DS and now I have a proper rack, and have an ass that Rhianna herself would be proud of (or so says DP!)
My mum was the same, nearly androgynous in shape until she had me, and has been all hips and boobs ever since!
I think some women just change shape after kids.
I was gutted at first, was so used to being the really slim one, but I now love my curves, I've embraced the "new" me!