Stringing her on
Here’s another story of a waiter serving a husband who was clearly having an affair. When the OP asked what he and his wife would like, the man told him he didn’t know since his wife was in Chicago. We have news for you, buddy: your wife is probably cheating on you while she’s staying at the Windy City.
Anyway, the woman he brought exploded right then and there, asking why he was continuing to string her along. When she got mad, he did, too, and the OP just left the scene before he could get caught up in their troubled relationship.