I think she looks fit, but boy shorts generally do not flatter athletic thighs. It's just a question of finding something a little longer. And, they just ride up on me; very uncomfortable. Of course, no one sees my Ibex boy shorts underwear, but at times, I have to stop skiing or snow shoeing to ah, readjust.
I see my athletic thighs as a badge of "strength." I just wish that there were more clothing manufacturers who realized that some women have this issue. Believe me, I used to have fat thighs and i know the difference!