How do you think Kate and Joe Keller feel about George impending visit?

Keller expresses puzzlement that George is calling from Columbus, where his father's prison is. Keller is suspicious that George and Ann are trying to open up the case again. Mother enters and is shaken by the fact that George needs to speak to Ann. She asks what it is Steve has to tell George that has required George to take an airplane from New York to see him. Keller insists there is nothing, and Mother twice questions his resolve on that matter. Mother finishes with a warning that Keller ought to be smart." Both Kate and Joe fear that, after talking with his father, George will re-open the case against Joe.