I stayed there 6 nights in total, and a friend of mime joined me in last three nights. When I first contacted Maria about the price, she suggested me to book a double room which was "5 euros more expensive than the original single room", however, when I arrived, she said (apart from the 5 euros) I still had to pay 15 euros a night for my friend, I had no choice but to pay. It's not I don't want to pay for the extra guest, but she should've had let me know before I started the trip, and charged me through airbnb, rather than asking for the money when I arrived. I could've found a cheaper place if I knew the room was not 5 euros but 20 euros more expensive for a second guest. And what if I didnt have enough cash with me when traveling? The rest was all fine, but an episode like this should be avoided.