Passing on the Blame

Hubby dear: A, did you scribble on the wood? (the wood around our kitchen island)
A: Ha?
Hubby dear: I said, did you do that? (pointing to the conspicuous crayon marks on the wood)
A: No!
Hubby dear: Then who did it?
A: Dada (big brother) did it.
Hubby dear: Dada? Are you sure?
A: No, no, no... dada.
Hubby dear: Then who? You?
A: No!(shaking her head vigorously). Mama did it!