Is NOBODY wrong in the post ? POST : Ok, so some background: about one week ago my SO told me her sister is coming to visit to see their father (we live in the same city and her sister lives far away). So she arrives and only then they wonder where will she sleep since my father-in-law's home is already packed up with family members (and already was 1 week ago, so it's not like it was a surprise). So then my SO just sends me a text message saying her sister is sleeping in our house. Like a "just informing" message. I talk to her and explain that although I don't have any problems with her sister sleeping in our house, I didn't like the way it was organized. They knew perfectly well that there wasn't enough space for her in their father's house but only when she gets here they "realize" that. My SO's family has this kinda philosophy like everything is everyones, not sure how to explain it, but it's like they share/give everything (for example, several of my SO's clothes are with her sisters and vice-versa, I gave my SO a laptop and it's already with her brother, etc). I told my SO that they should've known her sister would need a place to sleep and what they did is irresponsible and manipulative. Like, she's at my door, of course I won't turn her down. But I didn't like it, I felt that it was disrespectful towards me, a total lack of consideration. My SO just says it's her family so the door is always open and I explain to her that the problem is how things were badly organized and the lack of my input and that it could even be Pope Francis that I would be bothered nevertheless. In the heat of the moment and pissed off I also said she should just make copies of our house's keys so that she could distribute them among her family and make our house everyones. So now she's calling me a jerk and that I don't have any hospitality. Bear in mind that this is not the first time this kind of thing happened with her family. They just show up, no warning, nothing, and expect us to extend the red carpet. And I'm not talking about some urgency or when something unexpected happen. I'm not used to this kind of thing. Am I being the asshole here?