Even if she had all of her teeth pulled it wouldn't add up to 100g. Your teeth probably weigh between 1 and 2 grams each and you only have 32. She would be better off just donating blood to lose the 100g.
Idk if there's specific regimens for athletes losing weight but surely there's good sheet masks if not basic lotions/moisturizers you could use even if you don't necessarily care at the very least hopefully they put on sunscreen before going out
And yikes I feel like pulling teeth wouldn't help at that point might as well just get lipo unless they see that as cheating