DEFINITELY NOT RECOMMENDED
Carmen is just making use of her guests to buy her a living, she eats your food (lots of your food) , use your stuff( most of your shower gel, shampoo) without your permission, asking you to buy utilities at full cost which you dont or you seldom use.
When you discover her intention and try communicate better, all she left for you are threatening(to leave the place, not to use the kitchen anymore, to be careful of yourself and your belongings...) , accusing(you damaged her stuff while you didnt) and complaints to BNB against you which are not fair and reasonable at all. She just get personal against you.
She is NOT the host you would like to live with.