How would you tell your family member that they're fat as hell?
"You are a fat fuck"
dont make it about appearance. make it about health. "I care about you bro, and nobody else will say it, but you're fcking fat, and you gotta fix that or you're gonna keel over."
They should care, not you...
Shoot them with a .32 and when they don't drop like a sack of soggy protein powder say something like, "Damn Sis it's a good thing you're so fucking fat. The average person would normally go down after being shot."
I wouldn't. Why do you think it is your business to tell them something they already know?