AITAH for reneging on letting someone live with me because they said they won't sleep with me?

I'm 29M, she is 28F. We've been platonic friends since university a few years ago. We're not super close friends but have hung out on occasion, although we used to hang out a lot more on campus. She has fallen under financial duress and I offered to let her live in my spare room while she gets her bearing. This was a month or so in planning, and she was due to move in the second week of February.

We were talking more about our situation going forward and she said an off the cuff remark "just be aware I will not be sleeping with you". Just out of the blind. We don't have that type of relationship, nor do I want it to progress to that. I don't even joke flirt with her or put innuendos in my speech, so this took me by surprise she had an assumption I had an ulterior motive.

I told her as much and said that comment make me think of our friendship in a different (negative) way and I have to think a bit more about our arrangements. I said as much to be polite, but what I want is more time to articulate a way to back out. She said it was just a standard rule that she'd tell to any roommates; I am not a woman so I don't know if this is how it is, but it seemed really condescending.

AITAH here? Sorry, I am ESL so if my grammar is bad, my mistake.