To go along with that, when girls gain weight, it often goes STRAIGHT to the boobies...hell, when they go on birth control, some girls gain over a full cup size.
There was the video on a different forum I think of her bathing and you get to see basically everything with about 2% of her actually obscured by suds...her breasts were NOT very large in that bit, and I'd be fairly confident that the pill and a bit of weight gain (c'mon, she does have some thunder thighs going on, not that they don't suit her) would be enough for that...whether he had enhancement later is still being debated...