<human>: My MOH spent all weekend with him and at no point did he mention a girlfriend or wanting to bring a date. He's a friend who is also a laptop DJ traveling from St Louis and we're paying him. 

When the RSVP arrived, I saw he'd written "2" when we specified that we were "reserving 1 spot in your honor" so I asked if the addition might be one of his kids, who he was having trouble finding childcare for but who wouldn't attend the reception. He responded that it's a girlfriend (news to all of our mutual friends). I responded to him that we have to limit attendance to those listed on the invitations (hello), and only gave +1s to those who are engaged/married in the interest of space (read: money). He pressed the issue and said if she's sitting with him at the DJ table, would that make a difference? I responded that as much as we would have loved to have had all our friends invite +1s, we just can't honor some and not others. Then he responded that he'd like to pay for her. 

We're over our attendance by about 15 people per our catering quote, every person counts now. We had two other family members write in +1s but their circumstances made it ok, long story short.

Honestly, I'm torn between telling him a flat no or saying fine but we're not paying you for the gig. I mean, honestly. Don't put me in the position of saying that it's a money thing and then offering to pay for her... Do I just give in, knowing there are at least three friends who we didn't give +1s to (who we knew about their SOs, they just aren't serious)? Help me, Reddit. I'm about to get real bitchy over here.

Give me the gist of the text in a nutshell
<bot>: DJ invited a girlfriend no one knew existed without asking and is now begging to bring her in spite of me explaining why he shouldn't