]but I do like the idea of a mischieviuos Catherine.

Yes, I love this about her too. I imagine there are other bits and pieces of mischief that we are not told but can only imagine. I think the words: was seldom stubborn, scarcely ever quarrelsome, and very kind to the little ones, with few interruptions of tyranny suggest that while mischievousness was not a major character trait, it was something she indulged in from time to time.