Mary, who we've never seen before and never will again, shows up on the Girls' doorstep k-nocked up and svingle. Apparently, she's known them all her life, as they were all very close with her late mother. Fine. Dorothy is able to impart some experience-based wisdom on both Mary and her estranged father, using a St. Olaf story in a moment of desperation. Meanwhile, the fire of Blanche's loins shows up unexpectedly and the girls learn he hasn't, in fact, paid his debt to society.