This takes some thinking. If it weren't for that weird cross-over effect where information about other worlds leaks through in the form of fiction, she wouldn't know anything at all. As it is, she probably knows too much. So, she should keep it to the sort of thing that would be fairly common knowledge.

"Well, her world is probably a lot like yours, assuming you're from a standard version of earth. Low-level tech, dominant life form is human. She's a co-ordinator for a group of law-enforcers."