Quote from Audrey in the episode A Tire Convention and the Moral High Ground
Audrey: You know what'd be fun? Let's you and me go out and have a drink. Mandy: Uh, hello, I have a baby. Audrey: I know, but Connor can watch CeeCee for an hour or two. Mandy: Uh... Audrey: Come on, I'm buying. Mandy: Fine. Audrey: Great! We can tell people we're sisters.