There’s potentially both some unpleasant reality and some further metaphor in the way Mary ends the night by letting Hodge’s character set out on his own again without offering him a word of thanks, or offering him any help, or even asking his name. On a literal level, their alliance was always temporary, and he has every reason not to trust her, given her actions with the letter-opener. On a symbolic one, the film’s agenda is entirely clear about how much mercy or sympathy the poor can expect from the rich, and her indifference to him even after what they’ve been through together just carries that out further. But it’s an awfully sour, hopeless ending to an already deeply bitter movie.