<human>: Can you condense the text into three sentences or less?

We've had a lot of issues with this roommate already, this takes the cake, though. She's currently got an older man walking around touring the house, talking about where he's going to put his couches. None of us know this man. Our lease states we can have guests stay for no more than two weeks, and only with all housemates and landlords giving permission. No one has been asked, so clearly no permission has been given. One major problem: her stepfather is the owner of the house, so we can't just go to him. They run a business out of the house (another legal issue entirely...) and he let's her have full range (basically acting as property manager.) She's threatened my boyfriend (who is on the lease) with eviction recently just for telling her he didn't like her attitude or the way she tries to lord over us, so clearly talking to her is not going to go well. The contracts we signed are for 1 br/1 ba for each couple (in a 4 br/3 ba house) so that's already a major breach, my SO and I have our own bathroom in our room but roommate and his SO are having to share with these unknown persons. Basically, the four of us getting shafted need to know what we can do, especially since the landlord isn't going to hear it. We're located on a residential property in Baton Rouge, LA. Thanks reddit!
<bot>: crazy roommate is moving people into our house without even talking to the four other housemates, landlord is her father and also crazy, so we can't talk to him