My fiancé and I are on a tight budget and only gave +1's to guests who were already in relationships (and guests' SOs of course). Single friends and family members over 18 did not receive +1's. Recently, a groomsman asked if he could bring his girlfriend, whom he started dating recently. The groomsman is out of town and we have not met the girlfriend. We invited a little over the capacity of the venue, knowing some who could not make it that deserved an invite regardless, but I do not think we have room to invite this new gf. We would definitely tack her onto the list after receiving all the RSVPs, however, since they are out of town she would have to had booked a flight in advance, which puts us in a problematic situation. I do not want to risk inviting too many people but feel like it would be rude not to invite her, even if she's a recent gf. What should we do?