A simple piece of paper? Are you serious? I understand your mother. An ordinary sheet with incomprehensible words for her. It feels like something childish.

OP, your account is from 2016. How many of these pieces of paper do you keep on your desk? Your question is too banal for your account. Do you have a wallet but don't know how best to save your seed phrase?

What about flash memory, engraving your seed phrase on metal, eventually laminating your paper, and storing it all in several versions away from mom's eyes?