My mother was always a AA fitting with a quite high arch. She went to live in the tropics (after Scotland) for almost 10 years and wore sandals, thongs or went barefoot. She really wanted her feet to spread and become just an A fitting. Throughout this time her weight remained the same, outside of three pregnancies.
Instead, her arch dropped
and her foot lengthened. She became a AAA fitting and has been ever since. She finds it really difficult to get shoes that fit for width and has had to resort to custom made shoes at times. Luckily she is very gentle on shoes
At the same time she made sure that all the children went barefoot as much as possible as the wisdom at the time was that is was the best for developing feet. I now have a C or D fitting, with a high arch.
Additionally I am really hard on shoes...
She managed really well with all the other parenting stuff