There's a non-zero chance that she's actually just good at the work. Doesn't matter if she got her foot in the door starting with a degree mill or fraud, if she leveraged that into not fucking up the work and has an actual reference list attesting to such, she could keep landing gigs. We'd know otherwise, Finance is one of those things you can't really succeed in nepotistically. Numbers are numbers, so unless you were hired to cook the books, you gotta do the job right or you'll end up getting your employer fucked for accidentally cooking the books.
She does very basic accounting work based on her LinkedIn. In the old days she would be called her proper job title- a bookkeeper.
The more simplier explanation is that there is not enough accountants in America. The big four accounting firms now outsource a lot of their grunt work to India and the Philippines not so much out of choice but necessity because they cannot find enough Americans to fill the positions.