Call Girl is episode 14 of family guy season 11. It was originally aired on March 10, 2013.
When the Griffins find themselves in a financial bind, Lois is forced to find a job of her own. She gets discovered by a “voiceover” talent agent named Randy, who actually runs an adult-only phone line and pays his employees generously. As Lois settles into her new gig, she hears Peter’s voice on the other end of the line.