The part nobody talks about is how this puts you in a weird spot legally, not just socially. In a lot of these buildings the rule against short term renters exists because of actual housing laws, and if a neighbor reports it, you're the one standing there telling a fake story to whoever shows up. Marta gets a fine, you get a headache and maybe a knock on the door. The Ohio answer is funny but the real risk is that you had no paper trail that made you family if anyone pushed harder.