If you are 5'2" and over 10st and labeled obese, have chubby dc and come from a 'big boned' family used to eating junk or simply too much food, then criticising you is not going to help is it?
You don't think you or your dc are fat, end of. Criticising you is not going to improve your diet/attitude to food as eating and what you eat is definitely directly connected to mental health.
I am 5'4" and weigh 8.5 st and am a size 8/10 and would think that it is normal. But then again, most of my family and friends are slim and active so I do believe if you are surrounded by overweight people you are more likely to think that is normal.
If I was heavier I would feel sluggish and ugly. I am amazed at how fat women can be without it denting their confidence. I simply would be utterly depressed if I wasn't slim, fit and active.
I find factory produced junk food disgusting and so I can't understand why people would choose to feed/poison their dc with food designed to clog their arteries, rot their teeth and load lard on their joints so that they find running about difficult.
Having a positive mentally healthy outlook comes first I believe. It is a waste of time and patronising to listen to people harp on about how bad it is for health for them and their dc to be fat. All it is going to do is make someone even more depressed and guilty which is hardly conducive to positive mental health.