Four people staying in a room which was booked for two people

I stayed with friends at a rented accomodation where in the agreement, only 2 people are allowed to stay each night for around 100$ per night. However, we lied to the owner and agreed that only 2 people will stay while actually 4 people stayed. We didnt think this was wrong since we would only use the accomodation for sleeping and wanted to save money. So technically we broke the agreement and cheated the owner.

What is the best way to fix this as we are afraid that in the akhirah, we will be punished, since we used his property not according to the agreement. If we reach out to him, he may take action against us so we are afraid. Could we pay him the money for the 2 extra people (we assume it will be 50$ per night per person) and give it to him anonymously? Or can we just donate this amount to chairty because we are afraid to tell him.