What does Agatha Lambent say to make Faith believe that Agatha and her husband, Anthony, might be responsible for her father's death?

The conversation between Faith and Agatha during the photo is tense, and is used to build the two characters and to create yet another red herring. Agatha again makes it clear that she believes Myrtle is socially inept, referring to the fact that she called on Agatha the day of Erasmus's funeral. Faith says that Agatha was rude for not accepting them. This demonstrates that Faith is beginning to stand up for herself and for her mother, though Agatha is a self-confident adult. When Agatha says that she knows how she is supposed to behave, and that being a good wife is her most important role, Faith makes a rude comment about the pants Anthony Lambent is wearing that day. The red herring occurs with Agatha's response. She says that she cannot always “rein in her husband's impulses … but she must always strive to protect him from the consequences” (245). Later, Faith thinks about this and comes to believe that Anthony and Agatha Lambent killed Erasmus, and that Agatha simply went along with it as a good wife should, and is not trying to protect him.