Quote from Joey in The One Where Chandler Gets Caught
Monica: Phoebe and Rachel saw you with Nancy today. They think you're having an affair.
Rachel: Who's Nancy?
Ross: What's going on?
Monica: Okay- All right, guys, you better sit down. This is- This is pretty big.
Chandler: Yeah. I'm not having an affair. Nancy is our realtor.
Joey: I knew he couldn't be with a woman for 45 minutes!