Even if she weren't post-partum, weight loss of about 2 lb/week is a good rate for those that are not markedly obese but merely a bit over their target weight. It is sustainable and does not indicate muscle wasting, which happens to crash dieters who are not protein-loading their diets or weight lifting. Even in the obese, 2 lbs a week indicates that they are eating less, and if they continue to progressively restrict they will in some months approach a normal weight. Being treated as human at that point, rather than the fat fucking failure they were, would then present reasons to step up the caloric restriction and exercise.