Barrett was not convinced that Roddenberry was going to leave his wife at the time, later explaining that he was troubled because he had made a promise to Eileen and took the commitment seriously. By the time he started on the series, Nichols said that they were only good friends as his involvement with Barrett continued. However, during the production of the first season, writer Ken Kolb entered Roddenberry's office to wish him a happy birthday and found Nichols there, naked and under the desk, also waiting for Roddenberry.
Ken Kolb
Roddenberry