If you want another perspective – If I have 2 people regulary living in my propery I expect wear and tear to be less and would charge them less. If they have an extra person there I would expect them to pay their way, and I would expect extra money. I don't think that is unreasonable. And it would P me off that they didn't tell me first also, considering in the lease it states propery is not to be occupied by x amount of people.