Last summer I moved into my sisters, well, shed basically. There’s no insulation so it’s impossible to heat (this winter dropped to 9*F), there’s a sort of kitchen but no counter space or cupboards, a breaker trips if I have more than a couple things plugged in and running, and it’s full of spiders and beetles. I pay rent &amp; utilities similar  to what I’d pay for studio in the area. My boyfriend and I have been talking abut getting a place together, and then this month his rent went up by a ridiculous amount. We decided to start looking for a place immediately, but I said in the mean time he could stay with me. Now, he’s been staying with me nearly every night for the last 3 months so I didn’t think it would be an issue. I told my sister what was our plan was, and she said they were fine with it. But then a few hours later she said that she talked with her husband and he wants to run a background check on him and draft a rental contract. I feel really uncomfortable with this for a few reasons. I’ve been paying them cash at their request to rent a crummy shed (I also dog sit for them and shuttle their kids around as needed). And my BF isn’t a stranger to them; they’ve met, we’ve had dinners and board game nights and drinks together. And like I said, he’s basically been here for 3 months already. I understand I am in their space and I want to be respectful of that, but I feel like it’s an unnecessary invasion of privacy. Am I the asshole if I don’t want to agree to a background check? 