How would you deal with a friend whose conversations with you make you feel like you're being interviewed?

Tonight I’m going out with two friends for dinner.

We’re all females in our 50’s. My one friend, whom I’ve known for over 20 years, will act like this is an interview. She fires questions at us: who, what, where, when, why, how. She is a member of the organization that we work for so she is very interested in what’s going on behind the scenes. She was always very inquisitive but lately it’s excessive.

It gets tiring answering the questions but I don’t want to seem rude and I can’t think of a way to shake her questioning in a polite way.