She laughed at that, as if the very idea of someone being willing to help was the height of comedy. Plucking the cigarette from her mouth, she jabbed it at him, cruel as ever. When she spoke, it wasn't to him (not really). It was to herself. Like the conversation they'd had that terrible night - like all their conversations, really - Blair was never really speaking to Luke, she was talking to herself.
"No one would die for someone else," she said nastily, "let alone something that's meant to sink. The best you can hope for is that you have some other function that makes you otherwise appealing." The implication there was fairly clear from both how she looked him up and down and the bitterness in her voice. If someone wasn't willing to fuck you, you were hopeless.