We booked Kay's Sunny Flat with Balcony in Paris rental for 09/27 - 09/28/17. After confirming our booking and paying for the rental (which included a 30 Euro cleaning fee), Kay messaged us; she mentioned that she lives in the flat next door and that we would have to pay an additional 30 Euro in cleaning fees, in cash, directly to her (on top of the cleaning fees we already paid). The day before and of the rental we notified and updated Kay with our schedule; we would be traveling from south of Paris and would be arriving the next day. As we were traveling with a few senior citizens with mobility restrictions, we missed a few trains and were delayed in arriving in Paris. We initially arranged for a check-in at 2:00pm but immediately notified Kay at 12:00pm that we would not be able to make it until at least 8:00pm. Kay grudgingly obliged but when we notified her again at 8:00pm that we were running late she became hostile and told us that she would not wait for us. When we asked her when she would be available again to exchange the keys to the rental, she told us she would not be returning to the rental and that the only way for us to get into the flat would be to pay her staff an additional 20 Euro, in cash. We were alarmed at both Kay's demand for even more cash and excuse for it -- she mentioned to us earlier she lives next door to the rental but had just stated that she would no longer be available herself to exchange the keys to the rental. When we consulted with Airbnb about Kay's irregular demands for cash payments, they told us that it is against Airbnb's terms of service, that Kay had received prior complaints about cash requests from other guests, and that they would attempt to contact Kay. Immediately, at 11pm Kay became hostile and told us to find another rental,unless we comply with her demands. After contacting with Airbnb again, a case manager told us we should cancel our reservation with Kay and find another rental. We agreed, as we felt that what Kay was doing was a scam -- or worse. Be careful and safe travels.