any stories where a woman gets an age regression transformation and when she returns to normal her personality and memory changes
for example https://www.ararchive.com/story/1474
where a mother turns young and her daughter raises her for a few days and when she turns back into an adult her memories and personality changes
another example is
viewtopic.php?f=16&t=602
a daughter wishes her mother to be young and give her some traits so when she turns back into an adult those traits stayed with her so her memories and personality changes