THe op is still hot, but largely because she's got a very pretty face, it she was an ugo the body wouldn't matter. It also helps she(I assume) has a boob job, which keeps her shape looking very feminine, if she was a 30AAAAAAA due to being that fit without a boob job, again it would change how she looked.
Athletic rarely looks bad on a girl, but moving from athletic to overly muscular and theres a cut off point where it becomes unattractive.
I think in general, if the women is pretty enough that she'd be considered hot when only slim and not athletic or muscular, if she doesn't lose her feminine shape while becoming athletic/muscular, you don't have a problem.