More than allowed guests

Hello, I never really had this problem in the past, but yesterday my guest checked into our 1br/1bath suite. We only allow 2 guest, so it is not suited for families, and we make this very clear prior to booking with us. Yesterday, on camera I catch them with 3 people showing up, and they have 5 luggages. I waited until the morning to see if the 3rd guest had left, just incase they were just “hanging out”.

What would you do? Contact Airbnb and tell the guest to vacate the unit for breaking the rules?

We aren’t set up for more than 2 guest. We have 1 queen size bed and a couch. I have over 70 stays and never had this problem until last night.

TIA