What is the best example of tension between character in Flannery O'Conner

As they set off again, The Grandmother remembers an old plantation that she thinks used to be in this area. Bailey does not want to take a detour to go find it, so The Grandmother makes up a lie about how there are secret doors in the house with hidden treasure; this makes June Star and John Wesley scream and complain until their father agrees turn around and drive down the dirt driveway.