What you did was for you. After all that you have been through, it doesn't surprise me. At this point my suggestion is to stick with your guns. There are still plenty of opportunities to DB. Look at what you did as an "action" to move your sitch to a different stage. It may not be the stage you desire but hopefully it will get an intolerable situation off of dead center. Your H is comfortable living his double life. You now threaten to take that away (or more accurately his behavior). In a way, look at it as a big 180. Definately not "more of the same" if he see's you are serious.
You can still be lovingly distant. Just make sure he has the "good memories" of Sherry to live with if he doesn't come to his senses. If it comes down to a separation, I think it is better to leave on a loving note, than to stay until you are totally miserable and make the situation miserable.
