@Kassie10 There is no way to do that, no. I see that you already note it in your description near the top, which is good, but I would also re-state it in your rules. Perhaps something like:
- We allow a maximum of 4 adults and 3 children in our listing, including infants. [as an aside, Airbnb does not count infants as guests, so be aware].
You may even want to break it down further, given your sleeping arrangements: 7 people total allowed, 4 adults, 2 children, 1 infant (technically 6 guest maximum as per Airbnb).
However, the bottom line is, people don't read. I used to allow my space to be booked by 6 people maximum, but I stipulated in several places that it was okay for 6 for one nighters only (mostly to accommodate friends attending wine country weddings, a common thing for our area). I still had people booking for longer, and it was just more trouble than it was worth. Maybe best just to allow fewer people, or accept that people will try and push the envelope.