SO FMIL sent me a list of people and gave every 'single' person a +1. I asked FI about who has SOs and who doesn't. I guess two guests do indeed have SO's, I just don't know the SO's name and I had never even heard of these people before I got the list. Is it okay to just write "and guest" or do I need to get the names?
Also, are labels on an invitation really rude? Why?