My mother did not cause me to be anorexic. But all my food and body image issues do stem from her.

Telling a teenage girl that she has one foot in the grave, she needs to be careful about what she eats because it's all downhill now and she must exercise to be slim (FWIW, I was called "bag of bones" for years prior to this and force-fed at home and instructed never to snack or say I was hungry in public, also told when I was and was not hungry and told off for disagreeing with her about that). Ignoring the lack of eating in front of you that said teen is doing, then offering surgery due to the girl needing her nose and breasts done - which would she like for her 18th?

My mother did not make me anorexic. But I do not have a healthy relationship with my body. And if I had been taught to celebrate my body and listen to it more, I doubt I would have the issues I do.

I would say that your niece is in a more unhealthy atmosphere with her weight and needs to be removed from that and have some intensive psychotherapy to aid her in discovering what is normal. Although I would probably see the pictures you mentioned and feel fat and wish I could be that slim, thinking your niece has a gorgeous figure. I do that with the "shock" pictures of girls near death from anorexia. And this is years on and many, many meals later.