We learn that Sunil's former lover broke off their relationship on the library steps and then threw herself off a bridge. He was questioned when the police investigated her death, an apparent suicide.
Paul continues to confront Sunil. The birth control pills might not be proof of an affair. Sunil wants to change the subject and Paul stops him. The relationship Sunil had with his lover is similar to his son's relationship with his wife, and this is why Sunil is so troubled by it. When the patient disagrees, Paul does not back down--- he tells Sunil how it is. Does anyone else find it insulting when a therapist insists that a patient feels something he says he doesn't? Sunil considers Paul's theory, thanks him and leaves.
Paul is clearly worried about what Sunil may do. Call if you have disturbing thoughts. The frustration of both parties is palpable--- at times, Sunil raises his voice in an effort to be heard, especially about his right to snoop in his daughter-in-law's study. And Paul....well, Paul always looks frustrated.