Back in December when my FS and I got our invitations we had already made up a list of people we wanted to invite. We sent out our invitations and are now waiting for responses. My mom had a friend over shortly after we sent out invites and she knew we had invites left so she asked if she could invite her friend. I said no. She then asked if she could just give her an invite and I didn't see any harm since I had already given my answer. Now it's been 3 months and my moms friend came over and told her she was RSVPing to the wedding. I've been putting off talking to her for a few days but today I told my mom her friend was still NOT invited to the wedding and she is being butt hurt about it. This friend knows none of our family and friends (other than my mom, dad, brother, and us) and is two more people we weren't planning on feeding. My FS and I are also not close to this person but she's my moms "best friend." Am I just being mean for making her uninvite her to the wedding?