So we sent out all of our invites already (wedding in a month & a half). Since we sent them out, we've become close with two other couples who have recently-ish moved to town and become part of our circle of friends. I mentioned to FI the other day we should maybe invite them, but he was concerned that would be an etiquette no-no, since invites were already out and they would know they're getting an invite later than other people. I thought it would be ok since it's not like we said "ok, these 4 couples aren't coming so now we have more space." If it makes a difference, our final counts aren't due to the caterer until 3/18, and our RSVP deadline is 3/11. They're local, so no travel plans need to be made.
Is it rude to invite them now?
(ETA: stupid punctuation)