Ok, so there is a good friend of my fiancé's family who really wants to come to the wedding. We were at her wedding when we were both children long before we started dating which is kind of cool. She has told my future mother-in-law that she is going to show up regardless and if we tell her the price, she'll pay for her seat. Its come to the point of being uncomfortable a little because she is essentially inviting herself. Honestly, she is a good friend of my fiancé's family and its really cool that we probably met each other at her wedding. We probably could just send her an invitation, but if we are following "etiquette" I would then have to invite her husband and two children, which we really cant afford to do. Do I send an invitation with a spot for just one person? or do I just let her show up and try to have a place for her to sit? Its an awkward situation to have someone invite themselves and then put pressure on ME to make accommodations for them.