Quote from Ross in The One with the Engagement Picture
Chandler: Rach, if you have a crush on this guy, why would you hire him? I mean, you know you can't date him, right? Rachel: Oh, no. I know that. Although we make a joke that we spend so much time together, he should call me his "work-wife." Ross: Soon he'll be able to call you "that lady he knew that got fired."