Just before I got engaged I told my soon to be fiancé about my CD side. I wasn't going to live a life hiding and sneaking. She was ok with it. Never got married - relationship broke down for other reasons (I was just a jerk at that stage). Then met my now wife. Again decided to reveal all far before getting married. Been together 20 years now.
I understand that if you are already married and hiding then you really do have a challenge. I won't judge.
But my strong advice is to the singles: don't get married without having "the talk."