What is Bill doing the night Emmy delivers their stillborn child in the novel, Two Wrongs?

One night in London, Bill stays out so late, drunkenly carousing, that when Emmy delivers a stillborn baby at nine o’clock in the morning Bill is not present. That Emmy “had fallen down at the door of the hospital, trying to get out of the taxicab alone” (447) implies that Bill’s absence, specifically, and his bad behavior, generally, was partially responsible for the baby’s death. The stillbirth thus symbolizes the dissolution of their marriage, or at least the reason why Emmy falls out of love with Bill.