Thanks for pointing this out. Once again, a person is expecting another to act as she herself would do in a given situation, instead of in accord with the other's character. I think there's a kind of tunnel vision in this whole novel--each character having his or her own tunnel. Mrs. Bennet and Mr. Collins are the most obvious examples--they can't get off their favorite subjects. Mr. Bennet can't see the evil affects of his neglect and teasing. Lizzy suffers through expecting various characters to act as she would, or interpreting their behavior in a way consistent with her own character. Jane sees everyone as sweet and sincere as herself.