She'll be fine...even if what you want to talk about is fear of gaining weight. She won't feel shamed unless you say something like "boy you are fat." Many people who are somewhat overweight are actually OK with it. They don't base their self-esteem on how much they weigh. None of us should do that...but some people have really accomplished it. I haven't completely managed it yet (I'm overweight), but I'm closer than I was 10 years ago. But I would still be perfectly comfortable with talking to someone with anorexia about fear of gaining weight. I wouldn't feel shamed.