Tag age swap

"Ooh, she’s trying again!"

Darren’s wife Gabriela grinned wickedly and tapped the large brass amulet resting between her large, dark breasts. It glowed gently in response, its protective magic soaking up the spell and redirecting it back against its caster.

Growth Swap

I have an age change and reality change suggestion. How about a story where a girl wishes to be a big sister, so she ages into a 21 year old while her single mother regresses into a 13 year old?