For what it's worth atr, I applaud the decision. Beyond popular belief on here, it will strengthen your relationship. That's what it should be about. Of course guys on here will blast you for your decision, it's the manly' thing to do. I think it's better though that you and your fiancee want to strengthen your relationship before marriage. It will give you lots of time to focus on each other. You have the rest of your life to have sex together.
