The cousins are coming to tea and Mum is busy cleaning, shopping and cooking. Sam and his sister are no help at all; they just bicker and whinge and create even more mess. Meanwhile, something very strange is happening to Mum! "Suddenly the door burst open. I had never seen Mum looking THIS cross before! She tried to shout, but all that came out was smoke and flames and a terrible roar. "Oh no, " whispered Sam. "She"s gone completely BONKERS!"