One of my guests contacted me to say that her husband won't be able to make it to our wedding and could she bring her BFF instead "who will be driving." My fiancé is more lenient in this and is of the mindset that we would've been paying for her husband anyway so it doesn't matter, but I don't really want people we don't know at our wedding. On the other hand, she will have a 2-2.5 hour drive and I'm not yet sure how many people will be there that she will know. What would you do?