For all WE know this woman could suffer from a mental illness and just be paranoid, but that doesn't matter. What DOES matter is the patient's perception of the situation. Even if SHE is the asshole, SHE probably doesn't see it that way, and his presence there will upset her. It does NOT matter who started it or who is a jerk. It only matters to the medical professionals that she be as calm and as comfortable as is humanly possible during her delivery.