Kathy: I figure, "Stitch in time ..."
Buffy: "... catches the worm"
Kathy starts the saying "A stitch in time saves nine" and Buffy ends it with the end of the expression "The early bird catches the worm". The sayings have different meanings. Kathy's expression promotes doing work now to save work later and Buffy's is about waking up early in the morning.