Denial. Or fatty enblers. Im in a similar position. I also have a close family member, who is overweight boarder line obese.... I constantly get asked " oh so youre still on your diet?" anytime i turn down some deep fried or processed rubbish, or only choose to have a very small amount of it. Im even starting to get comments now from my parents that im getting too thin when compared to some whos obese?? Yea i damn hope so. Recently snapped a little last time i was asked if i was still dieting saying "No, im not on a bloody diet.  I just dont mindlessly stuff my face just because there is food put in front of me!"  I did hurt some feefees