Like others have said, it seems really up to you. If you are able to have something off-program and then get right back to your WOE, then is really isn't so bad.

However, if you are the kind of person that one off program meal/dessert starts you on a larger off-program spiral, then maybe it is better not to go off or you may end up worse than when you started.

You know yourself better than we do. You might gauge your own reaction with how well you did Valentine's day. If that wasn't a problem, then maybe an occasional off-program food won't throw you off too much.

Bottom line - you've got to be able to live with this WOE, or you won't stick with it!