The Great Gatsby: Daisy's insincerity
The instant her voice broke off ... I felt the basic insincerity of what she had said. ... I waited, and sure enough, in a moment she looked at me with an absolute smirk on her lovely face, as if she had asserted her membership in a rather distinguished secret society to which she and Tom belonged. (17)
I'm confused here. Is Nick implying that Daisy is shallow because she doesn't really believe what she said, or because she feels that she is somehow better than he is, as a member of the "secret society"? Or both?