Tristram heads home, feeling slightly drunk and pretty upset about the beating he witnessed. He's shocked to see Derek stepping out of the elevator.
Derek lies and tells Tristram that he came to express sympathy for his nephew's death. Tristram doesn't believe him, but can't imagine why else he might have been there.
Inside their apartment, Beatrice-Joanna serves supper. She's still naked under her dressing gown, and Tristram makes a move. The two haven't had much sex since their son was born, and Beatrice-Joanna turns Tristram down.
Suddenly, Beatrice-Joanna remembers that her earlier tryst with Derek may have gotten her pregnant. She decides that it'd be a good idea to have sex with Tristram after all, so that if she is pregnant, there'll be no reason for him to suspect that the child isn't his.