As a previous poster said, some mums do seem obsessed with weight. Mine passed away over a decade ago in her mid 70s. but she constantly had something to say about my weight, no matter what it was - and she often had something to say about my DCs weight too.
At one point, my kids were probably one - to one and a half stone overweight in their mid teens (for 2-3 years,) And every time I went around, she had something to say about it. The school nurse, the teachers, the doctors, the GP Practice nurses, never made any comments about it as it was hardly any extra weight, and they lost it in their late teens. But mother was the expert!
But yeah, ever since I can remember my mum poked at my weight. She always had something to say about it. Hectoring me and said I'm chubby, and 'no lad will ever want me' 🙄and 'hopefully I lose the puppy fat in my 20s.'
She kept on at me even though at 5 foot 4 I was only ten and a half stone in my mid teens. Not thin yeah, but not morbidly obese! Then at 16, I went on a diet and dropped to 8 stone. Then it was 'you're too thin, you look gaunt, you look like a corpse, and you need to gain weight.'
Then both times I was pregnant she kept on at me. 'Make sure you don't put much weight on. You'll never get rid of it.' Within 4 weeks of having the baby she was like 'I can't believe you haven't lost that baby weight yet. Come on, there's no excuse. Look at Lady Di, (and she mentioned other famous people too,) 'she lost all her baby weight within a few weeks!'
It was just ridiculous. No wonder - like hundreds of thousands of other people, I've got an eating disorder that I've had for 35 years plus that I've not been able to shake. I honestly put it all down to my mother. She never ever had a go at my brother though, who was always routinely a couple of stone overweight. And he was 4-5 stone overweight for the last few years of her life. Golden Balls could do no wrong. She NEVER criticized him for anything.
Like a previous poster said, I would never, ever, ever, say anything to my DC about their weight/size/body shape. I don't want them to feel the way my mother made me feel. There were some cruel people in those 2 generations. (The baby boomers and the generation before them.) Very sharp tongue. Very critical. Very rude. Very outspoken and rather nasty at times. Not all of them of course, but certainly quite a few I've encountered - and quite a few people I know have encountered. (And quite a few on this thread have by the sound of it.)