From  what you write, no, she could not come--if he is to have no contact with her, that means *no* contact; even if she initiates the contact at your wedding, that would be a violation. It may be possible to get permission for her to come by getting this order modified, but you need to make sure to do that in advance (and be aware: while it's possible  to get an order like this modified, even if only to provide one-time permission, it is not a given that you will succeeed; but it's worth trying). Contact a criminal defense attorney about the situation and see if he/she can't help you modify the order or otherwise get permission for you aunt to attend, either by going to the probation department or by seeking a court order.