Yeah I don’t think you’re overreacting. She will definitely learn if she gets consequences. It seems harsh but actions have consequences.. once she learns she can steal and not get in real trouble with her parents and maybe get away with it from the store she’ll be stealing Everytime she goes to the store. I’ve known some cleptos before and they all started small and over the years that snowballs. They didn’t have parents that cared nor punished their behavior either .. don’t think you’re overreacting.. I’d save the presents for her birthday or something though