What should I do?

This morning Madison was begging me to let her play with her hamster. So I unlocked the cage and let her take it out. She was holding it for awhile, and then went into the family room. She arranged her padded Dora chair and Maya's padded Dora chair facing each other. Madison sat down in Maya's chair, and put Fuzzy in her chair so she could face the hamster and play with it in an enclosed space. I said "Madison, I don't think you really want to do that....What if Fuzzy pees in your chair?" and she said "Oh, so should I put her in Maya's chair?" That girl is a stinker!!!