@Bernardos0 The best way to deal with this is
1) As soon as they leave write them an honest review
2) If they review you quickly then raise a claim for additional people as it is then too late for them to change their review.
Alternatively
1) Message Airbnb and explain they have broken the rules on numbers and you fear a retaliatory review if you claim for the additional people
2) Claim the additional people
3)Leave an honest review
4) Pray that Airbnb agree the review is retaliatory and remove it