I had a similar conversation with my mum about weight, she kept saying she isn't the same size 8-10 as me, although she is far more petite than I am. She was even more petite in her teens, I think something like 44-45kg. Apparently on the Asian BMI scale thats good. Since she had my brothers and I, she recovered well but she, in her eyes didn't go back to the size she was. This was demonstrated through her trying on my formal trousers that she wanted to borrow for my brother's graduation ceremony. She couldn't get her leg through and I was like mum you know I'm not that skinny. Nonetheless my mummy looks fantastic in whatever she wears.
I was skin and bone when I was in DKA, I think I was a wee 20kg 8 year old. I put weight back on during primary school, I felt it through my school clothes but I wasn't fat. When it came to secondary school from year 7 - 11, I shot up from chubby kid to size 12-14. DKA didn't help and bullying didn't help but consultant at the time wasn't concerned with my BMI of 27/28. Weight came off slowly towards finishing GCSE, I got into makeup when I was 17 and now I'm a squishy potato with ikea drawers stacked with makeup and clothes that are stretchy. If I'm honest, if by chance I'm pregnant, I wouldn't need to buy clothes because my bf has got me covered on that front.