Katie's sister, Sissy, is a sassy, free-spirited woman who has recently married for the third time. Katie learns this from gossipy insurance agent Mr. Barker when he comes by to collect the Nolans' weekly premium. Scandalized and embarrassed, Katie cuts off her relationship with Sissy, which makes the children, who love their unconventional aunt, unhappy. Francie is also worried that the building's landlord has cut too many branches off the tree in the tenement's courtyard, which Francie and her father call the Tree of Heaven, and that it may die. But when she points this out to Johnny, he explains the cutting back is necessary and the tree will grow again.