this is why you are fat

>fat sister, not terribly fat but overweight
>not in bad fitness shape, runs and exercises often
>"i'm just big boned"
>tries to follow paleo
>fails due to love of bread
>tell her that she needs to eat better and less food
>she tells me she already does this
>bake cookies, leave leftover dough in fridge
>she eats it all when she thinks no one is looking
>usually eats only healthy food, but over 3500 calories and 6 meals of such food daily