Quote from Captain Stottlemeyer in Mr. Monk and the Bully
Adrian Monk: We've been following him. Natalie: Right. Captain Stottlemeyer: You were following him? I wonder why. Adrian Monk: Well, he was seeing a woman. A married woman. And we're following her. Captain Stottlemeyer: You were following the woman. I wonder why. Natalie: Her husband hired us. Captain Stottlemeyer: Until you hear different, I wonder why?