oh shit, i forgot the most important thing:
is she good looking? chances are, she isn't.
and if so, tell her her the good news: ugly people don't have to worry about fat thighs. no matter how much fat they lose, they're still ugly.
so she shouldn't even bother. fuck, you can get a her a super sized (aka value sized, aka family sized) bag of doritos and celebrate.
this should relieve her greatly and make her happy.