How do they approach other misbehaviors? I'm not sure how to expand on boundaries, because the only focus is on theft. Without actual evidence that your daughter took the key, I believe a huge line was crossed. Accusations without concrete evidence and reducing a child to tears over it? If my parents ever dared dream of such nonsense, that would be the last time.

I would probably use the Do you know Why Stealing is Wrong? Approach. Because it's not about My Ego, it's about instilling Moral Code. But that's me...