They look mighty natural to me.
Cmon my man... the evidence is pretty substantial that she's had implants. Putting aside the statistical likelihood based in her ethnicity: gravity-defying, perfectly round, tiny and high set areolas, can go braless or in string bikinis with absolutely zero droop. Look at some of the gifs/vids with her in motion, or pics where she's laying down and they go nowhere.
Not that I'm complaining - she's smoking hot.