Just have her think it over. I’ve heard so many horror stories of petite girls getting implants and not being able to breath correctly after getting them. Their frames are just not built to have DD’s.
I do understand actually, bigger boobs is not always better. Clothes are harder to find, it brings a lot more attention to yourself and not always for the right reasons, can cause back and neck problems especially on a tiny frame like hers. Just take in all of these aspects before committing to a procedure like that…it’s not just Yay Big Boobies! There can be downfalls and if she’s always felt insecure about herself, this may not even solve it and maybe therapy would be a better (and cheaper) option.
I’m not saying don’t ever get implants, but just take in everything that hs to go along with it before changing your body. Or just have her watch a couple episode of true life about getting implants. Pretty helpful.