There must be a reason why a 16 year old is wearing a size 16? Has she been examined for serious medical conditions? Such as hormonal issues? The self consciousness may have something to do with her current living conditions. Then, given that you are in the position that you are in, her choices in clothing is rather skewed.
Many lovely sistahs who are "endowed" find out too little, too late when it comes to obesity, unfortunately. And much of it may have to do with poor food choices while growing up--meaning that the supermarkets in depressed areas have food that is rotting or spoiled, which causes major food allergies causing inflammation and excessive weight gain simply because the neighborhood is too poor to demand fresher and healthier food!!! And I have a suspicion (sp.) that this kind of craziness has been going on for YEARS!!!
Anyhow, more and more of OUR young people are suffering from adult type illnessness that are suppose to affect people well into their 60's!! High cholesterol, high blood pressure, diabetes... The question is why? Could it be binge eating? Poor eating habits? What? Did OUR folks have similar problems 50 years ago? NO!!! In fact there was starvation... So what is the deal???
As a scientist, I ask these questions. But living in a community which is depressed--and a place ironically researching the dis-EASE causing obesity, I find that the foods in the supermarkets are of very poor quality. Not even one's dog would be fed some of the food stuffs that being sold...
So ladies and gentlemen, those who have weight gain issues--the old adage goes, "watch what you eat..." Some of the food stuffs is of very poor quality even if the dates printed have not expired... If it don't look fresh, don't buy it!!! Especially, meat products. Make sure chicken is not yellow--indicating Samonella poisoning, Fish does not smell bad, Beef is not brown and pork is not excessively white and brown... The spoilage can make you fat and sick!!!
That's my take on the deal...
I have no idea how you could approach a poor teenager about her clothing choices... Maybe an find someone spiritually to uplift her as a start--such as who was Queen Nzingha? I dunno...