In chapter 18, how do Tom, Becky, Alfred, and Amy behave? Which of the four, in your opinion, makes the biggest fool out of him or herself?

Immediately after returning home, we see that Tom is back in his regular routine despite his attempt to change. He easily manipulates Aunt Polly by telling her about the dream, and although he tries to forget about Becky, he flirts with Amy Lawrence only to attract Becky's attention. His actions seem somewhat petty and it doesn't appear that Tom's adventures on Jackson Island have helped him mature at all; instead, he simply seems more self-confident and temperamental.I think that Aunt Polly shows herself to be rather simple minded here.