La Collectionneuse (2001)

Greg is a somewhat shabby salesman going door to door selling his vacuums to housewives. He takes advantage of his job, and of his encounters to cheat cheerfully on his wife with his hypothetical customers. But one day, he runs into Clara, a young woman who will make him pay dearly for his accidents. Under the threat of revealing everything to his wife, she will demand that he give in to all her whims and fantasies...