Yeah, I did feel that The Cursed Child painted a little more high-strung than I'd imagine her as an adult. I mean, I do think she's the type to shout at her kids a bit (way less at Albus than the other two though) but ultimately she wouldn't be particularly strict and definitely not the type to have a sugar-free household. It was Harry who mentioned it in the Cursed Child - it might have been some kind of attempt at the "ball'n'chain" sort of thing and if so, ugh! There isn't anything else in the play that suggests that Harry finds Ginny restrictive and that would definitely not be my idea of their relationship as the grown-up parents of three children.