It twists her shoulders back in an attempt to hide side fat. She might be holding the shirt back. She is also contorting her body to the side. See, some fats gain weight then hover around 20 of that obese weight, which is why they claim set point theory. The only reason she has a "shape" at all is because she was thinner in the past few years and gained to this, as in she destroyed what was once nice instead of growing up fat.