She seems to have back problems. She can only stand comfortably with her left hand on her hip while arching her back.
That's because the stupid girl has NO tits. That is called the Miracle Bra pose - cocking a hip and arching your back makes what little you have look bigger on camera.
I myself, of course, have never faced that problem. But I can recognize it in the less blessed of my sisteren.
IMO, Miracle Bras are false advertisement.