Sounds like you see the problem before it becomes a much worse. If you don't quit you may upset your wife and end up like one of them men who lose their wives from indulging.
Actions speak louder than words. Don't say anything to her because you will then have to live up to an image you yourself haven't obtained. Just don't drink, and in this simple cure your problems will be solved. Over think it or over talk it and you risk having to live up to an expectation and feel uncomfortable around your wife especially if you fail. But you won't fail if you just stop drinking because the drink does not have arms to lift to your mouth.