I know a few friends that have got them. 2 of them got implants partly because of, no joke, clothes fitting poorly. They are fitness types with bigger hips/butt/thighs. Find a dress they really like but can't find a size that works. Either top is good but can't squeeze their ass in it, or bottom is good but the top is flapping in the wind.
She sort of strikes me as this being a part of the reason. All the dresses she wears she has a ton of extras going on in the top.
Are there other reasons, probably, but we are never seeing them so in the end what does it matter.