The original poster did shear that she had lost a lot of weight and had lose skin in places. and in a lot of porn even attritive women show the same kind of folds when bit over. but i think as you look at the pic above the one your talking about you can see her hands are bound and being pulled to the sides as if there is a strap across her stomach. its very hard to tell if this is the case. If so i am sure that would be pushing and pulling on the skin and maybe giving that look. just a guess.