Party Time

Mr. Morgan and I have been invited to a Halloween party in a few weeks. Some good friends whom we don't see often are hosting, so while we don't get giddy about the holiday, we want to attend the party. We have childcare arranged, but we don't have any good, easy costume ideas. I've been thinking of playing up my pregnant belly, but it's not big enough for some of the costume ideas I've seen online. Any ideas for fun, couple costumes?