A gradual but very noticeable escalation takes place during this conversation, as Laurent and Thérèse go from talking about how much they want to be together to discussing the prospect of Camille dying. They don’t come right out and say that they want to murder him, though. Instead, they flirt with the idea, speaking broadly about the fact that it is sometimes possible for people to kill others without getting caught. But the implications of this conversation are obvious: the lovers have become so desperate for each other that they’re willing to consider murdering Camille.