Aww but she's such a sweet old lady :)
haha but yea, she doesn't play with a full deck, that's for sure. Can't count all the times she's slept on my sims couch (she couldn't get to their beds, because locked doors), eaten their food (even if she brought her own.......), littered the place with kava cups/drink glasses. She can litterally stay for days, that woman. And when she finally leaves, she'll call your sim inviting them over, inviting them to San Myshuno festivals, ask if she can visit...
So I moved my sims out of Ohan'ail town, and they never looked back! :D