That would be as if your client asked you, a professional freelancer, what you are doing for a living. The question carries an assumption within itself, namely

That would be as if your client asked you, a professional freelancer, what you are doing for a living. The question carries an assumption within itself, namely that your work (quality, kind of work) can't possibly sustain you. Aimilarily if you ask staff that your assumption is that this can't possibly be a work that anybody would ever like to do voluntarily.