If anything, it might just be the camera angle. Taken from the top down, so breasts/head are huge and the rest of the body is tiny. From the before & after pictures, the biggest difference I saw was a massive pushup bra. Some guys might mistake this for photoshop, but the same effect can be made IRL via propping up tiny or sagging tits with multiple padded bras and socks. And with these giant non-boobs, an effective "waist" is created where there once wasn't one, enhancing the after picture.  TLDR: She fat.