Is OTHER wrong in the post ? POST : Okay so a few days ago my sister calls me asking if she can stay with my partner and myself for a night if anything happens to her and her boyfriend of 5 and a half years. Not thinking anything would happen soon I said yeah sure, she then called half an hour later saying she's on her way as she just broke up with him. 

Now my house is a tiny unit with two rooms, one is our bedroom, the other is a study room that does have a small bed in it for when guests come over. This very rarely happens, so it's main use is to study and use our computers. 

She first said it would be a couple of nights a week until she found a new place, then it's every night for a week, now its two weeks...I feel like this is going to keep growing until she either gets a new place or I can't handle it any more. She gives me loads of washing to do for her at night then goes straight to bed leaving me hang it all up for her. She went back to her old place last night to dye her hair black and comes back after midnight wanting to dry it in a carpeted room which I ask her not to do as it might flick black hair dye everywhere. She gets annoyed that she has to dry it in the bath room, which makes me feel like an ahole. Then this morning I wake up to her using an OIL based hair spray to straighten her hair in the spare room on the carpet! I ask her to not do that as the oil will go into the carpet, and she gets stroppy and says I worry too much. 

I'm in a rental, that's about to be sold by the landlord and I'm trying to keep it nice for when people come through looking at it.

Today is her day off and because she slept in, she is just going shopping instead of looking for places to live. I feel the more I mention that she needs to keep looking at places the more she gets annoyed with me. I don't know what to do as she clearly doesn't respect my house or myself, and I feel trapped that I can't say anything or I look like I'm an asshole. 

She also is not upset at all about her brake up, she only feels bad for the guy, so I can't put her behavior down to that. My partner and I have already had a fight about her being here as we don't have the space to house another person indefinitely. I need help  as I don't know how to approach this with her with out her getting immediately defensive. AITA?