She was wearing a very sexy underwear but her bra still hanging on hanger. Probably she forgot to put on her bra and the photographer was rushing. The bra behind has become a distraction to the viewers. But on the other hand, the hanging of her bra can also make some other people feel great, it might be able to expand the imagination of others. Some people might feel that is even sexy! Well, certainly, not putting on the bra is more sexier than put it on.
