Honestly, if that is true, I applaud that attitude, if what she wants is to lose the weight slowly but healthily, that's fine by me.
BUT meanwhile, why should she go out almost naked when her body still looks like that? She should dress for the body she has, whatever size that is.
Agreed - no way would I be dressing in a revealing way if I thought I was 20 lbs too heavy to be doing so (at least )