maybe she should be more conscious of her diet.
no offense, but
if anything's giving her a smell down there, it's what's she eats up there.
I am self conscious of any smells going on as well. But the labia are often tucked a little bit in there and producing smegma, retaining urine odors, vaginal fluids and growing bacteria. This is totally seperate from the possible smells coming from your ass or ass crack also.
There are many possible reasons even if you eat well, are totally healthy with no yeast, bacterial, urinary or viral infections.
A vagina is like a mouth, no matter how good you are at dental hygeine you might not have a fresh breath if you sleep, eat something or just plain havent brushed your teeth in the last 20 minutes.
Even newborn babies get a stinky fishy smegma smell after a sort period of time...even on the ideal diet of breastmilk or formula.
Pussies just work like that, which is why a lot of us want to wash up really good prior to anyone going down there.