What is the theme of chapter 12?

Difunctional family relations and ego seem to be a central theme here. At dinner, Waverly and Rich disdain the crab's brain, which Lindo says is the best part. Then Waverly begins to sneakily insult Jing-mei, telling her that she should get her hair cut where Waverly goes--though it might be too expensive for her. Furious and wanting to hurt the other woman, Jing-mei asks Waverly why she hasn't paid her for the copy-writing work she did for her company. Waverly looks flustered at first, but then she says that Jing-mei's work was unsatisfactory.