What does Maureen do to satiate her obsession with money in the novel, them?

Maureen satiates her obsession with money by secretly meeting with grown men, going to motels with them and having sex for money. She keeps her savings in a book in her room. When her mother's second husband sees her in a car with one of the men, he finds the money and then beats her mercilessly. For almost a year Maureen stays in her room, gaining weight, not responding to people who talk to her.