How do I tell my new colleague to please stop inviting unwanted guests to my party?

Next weekend my boyfriend and I are hosting a house party in our spacious one-bedroom apt and are looking forward to having anywhere from 20–40 people show up throughout the night.

We do these events about 2x a year and enjoy inviting various friends and colleagues to join us for drinks, snacks and mingling.

I’ve invited all of my colleagues, including our new translator who is nice but a little bit of a space cadet. He asked if he could bring his friend/roommate/ a date whatever and I told him that he is welcome to bring one person with him.

Well…today my boyfriend informed me that this kid has taken the liberty of inviting twelve people to our event. I was shocked because I distinctly remember telling him that it’s fine to invite one friend, but that our place isn’t huge and since the weather is cold, we can’t open the roof just yet.

This puts me in an awkward situation. I was pretty sure our FB event was private and couldn’t be seen by non-invited persons. At least that’s what my BF told me… Should I go through and manually disinvite those he’s invited? Would that make me look bad? I should at least let him know that I’m doing that, right? I don’t want to start our working relationship out on the wrong foot, but c’mon dude!

I’m thinking I should just talk to him about it tomorrow and ask that he only bring himself and one other guest. I’m really not comfortable with having 12 strangers descend on my property, especially when alcohol will be served.

What would you do if you were me? How should I start this conversation?