A mother and son were doing dishes while the father and daughter were watching TV in the living room. Suddenly, there was a loud crash of breaking plates, then complete silence. The daughter turned to look at her father.
Daughter: It's mummy!
Father: How do you know?
Daughter: She didn't say anything.
Daughter: It's mummy!
Father: How do you know?
Daughter: She didn't say anything.