I dont buy into binge eating disorder, just my opinion so in no way fact. I just think she is lazy, has a very poor diet, and is so into this loving a bigger body, that now she is unhappy with her size she needs a valid reason to address it that's in line with her account. She is no doubt on medication that causes weight gain, that as well as her awful diet and never moving her body is simply the cause of her massive weight gain and probably has a huge impact on her mental health too. Binge eating disorder is not a poor diet, its massive amounts of calories in one sitting, often in secret. The treatment is cbt or self help. Basically stop shoving sweets and crap food in yr mouth and move more, it's not that hard. Maybe replace the naps with a walk. Stop being a sloth.