did you invite her? or?

that is what caller id is for!

Why is she visiting then? Unless your definition of not having a good relationship is different from mine.

A large portion of my family lives in Ottawa, including my parents. She sent me a message on Facebook, and I didn't reply because the only thing I could think was "Yay?"

Whenever she's here, she mostly spends her time drinking with friends, and not visiting family, and then later drunkenly regretting it.