OK .. I am smiling at your post. When I was 330 lbs and a size 30/34, somehow wore a 42B. After losing 147 lbs, and getting properly fitted for a bra, am now a 38C. Don't know whether it's losing the fat in my midriff that made them more noticeable, but some people actually think I had them fixed (and I didn't).
While one may initially lose weight there, it evens out. :]
When I lost 67lb I went from a 38DD to a 34G dont ask why I don't know- I lost another 20lb and am at a 34GG.....