Here'e some helpful tips for you. I've kept a running list of validating statements and other gems gleaned from this site.

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If W talks, just listen. Keep your questions impersonal.

WAS: I saw our friend Bob yesterday.
You: Oh? How is he doing?

WAS: I went out to that bar last weekend.
You: Did you have a good time?

WAS: I'm going to Tennessee this weekend.
You: Ok, I hope you have a nice time.

If W asks you questions, answer but be vague--don't launch into huge details.

WAS: How was your weekend?
You: Great, went out with some friends and had a good time.

WAS: Where were you last night?
You: I was at the gym.

WAS: What are you doing tonight?
You: Probably going out to dinner.