My 18 year old niece just moved to town and things aren't really working out with her new roommates, so she might come live with us. I would not want it to be permanent! But so many family members helped me out when I was younger that I hated not to offer.

I'm her aunt, but that's only a 9 year age difference - how would you handle this? I don't want to learn any wild ways that I have to hide from my sister haha! Thoughts? Suggestions?