FI and I have recently found out my FMIL is inviting guests verbally and many of them are not on our guest list. We are attempting to keep our invitees to a minimum and extra guests are not in our budget. She's even gone so far as to give some of them hotel information and they've reserved rooms in our block! But now FI and I are going to look like complete jerks if we don't invite them and I'm at a loss as to how to handle this.