'Sit and Shiver' is a mishearing of the Jewish custom 'sitting Shiva', in which the family and friends of a deceased spend a week sitting on boxes and praising his good qualities. The corpse in question is Debby's father, a mensch who, Debby trenchantly asserts, was faithful to her mother for 50 years. Signs might as well appear marked 'Danger: Disillusionment Approaching'.