I remember hearing the Preps talk a lot about their parents.
One of Chad's quotes: "Pinky's father bought her another Ice-Cream factory."
(In "Tagging")
Parker: Some leader you turned out to be.
Derby: Father says Leadership is about looking after those you lead. He taught me that right before he laid everyone off.
Jimmy also says stuff like "Maybe I should write a letter to mom" if you leave him idle & mentions her occasionally when boarding Carnival Rides (Big Squid, Ferris Wheel)