Aunt plus 1

My aunt texted me this week asking if she could bring a guest to my wedding, we haven't given a final headcount and we are way below where we thought we would be so I said yes. When I did my invites I had asked if she wanted a plus 1 and she had told me no. After giving her a plus 1, I texted her a few days later for the individual's name, all I got back was it's a male friend... Ok that's fine, but can I least have his first name for place cards. She finally got back to me. She told she was only bringing Bill (aka male friend) to make my uncle jealous. My aunt and uncle were never married; but my "aunt" who I guess isn't technically my aunt has a daughter from another relationship and my uncle has always been a father figure for her. So we have always been in each others lives. Well my uncle started seeing his girlfriend about 2 years ago and has yet to introduce her to my aunt or her daughter my cousin. My uncle is bringing his girlfriend to the wedding. I feel like this is a whole lot of drama waiting to happen. Ugh this is going to be a mess. I should of asked my mom before I gave an immediate answer to my aunt. And to make everything worse, my aunt stated that if Bill can't make she is bringing her other friend Cheryl and my mom and I both can't stand Cheryl. I should of said no... I don't know what I'm looking for here right now, maybe reassurance that everything will be ok and they can be adults for one evening.