In the movie Enemy, Helen doesn't seem to know what Anthony does for a living.
One day she gets information about a person Adam (who claims to look like Anthony). She goes to see him. She finds out that it is (might be) Anthony who seems to think he's Adam and is a teacher. But this is a real job. Adam is a teacher.
Anthony on the other hand is an actor who didn't get more than 3 films, that too cameos. He doesn't have a career.
All this while, how did Helen never bother to find out what her husband did for a living? They live in a nice apartment, sosmething's gotta pay for it. Given she was quite suspicious about Anthony, would she not want to know what he did for a living?