I don’t think her breasts have been enhanced. A lot of her clothes are over done as push ups giving them a silicone look, which seems to be the fashion.
But if you look at other pictures where they are not squashed and pushed up, they (for lack of a better word) hang very naturally. To get boobs that large via silicone, they get that over rounded grapefruit look and stand way too firm.
I don’t this this woman is genetically disposed to model thinness. Her genes say Rubenesque and that’s the way it is. I don’t think she can diet her body type away.
If one is a big boob guy, natural ones like hers fit the bill (or bra?).