Teatox
I hadn't considered it in that direction, honestly.
Now that I look closer though, there's enough subtle details different to confirm these are two different poses, not one generated from another picture.
Finding matching, flat-toned underwear of simple design in different sizes isn't really difficult enough to be suspicious in and of itself.
To prove that, you'd want to be pointing at a patterned underwear, where said pattern was distorted to the new size, as opposed to an actual bra, which would just be made with more material, with an un-distorted pattern. We don't have such clear evidence in this one.
Now that I look closer though, there's enough subtle details different to confirm these are two different poses, not one generated from another picture.
Finding matching, flat-toned underwear of simple design in different sizes isn't really difficult enough to be suspicious in and of itself.
To prove that, you'd want to be pointing at a patterned underwear, where said pattern was distorted to the new size, as opposed to an actual bra, which would just be made with more material, with an un-distorted pattern. We don't have such clear evidence in this one.
If she'd lost more than half her body weight in 40 days, she'd be in the emergency room (and there's be a LOT of loose skin).