My sister's husband is a huge fat fuck, like 350+.   My nieces are 5 and 8 and both fat.  The elder one has a noticeable pot belly.  She's screwed. Why are they fat?  Because my fat fuck brother-in-law stocks the house with a bunch of bullshit junkfood for himself. I am a massive shitlord and very strict with my sons' diets, but even I have a very hard time not sharing food with my kids.  If I'm eating some dried mango, my younger one comes over and wants to have some, and I almost always give him some even if he just ate.  It's like reptillian brain shit.  The reflex is deep. But my boys aren't fat, because I don't eat garbage food.  So when I share with them, the worst food they're going to get is some dried fruit, some pretzel sticks, or a couple of peanuts. My brother in law has been known to eat an entire box of Entamin's chocolate chip cookies for fucking breakfast.  If he decides to "share" a 200kcal cookie with his 5 year old daughter that's like 15% of her daily calories in a fucking cookie.  If he shared 3 pretzel sticks instead she wouldn't be fat. Choices are made at the grocery store.  If you don't buy shit food for yourself, you won't have to worry about your kids getting into it, or your parenting reflexes subconsciously causing you to share food.