Wilson walked near for the last words. "We can’t go, folks," he said. "Sairy’s done up. She got to res’. She ain’t gonna git acrost that desert alive." They were silent at his words.

– John Steinbeck

The Grapes of Wrath, Chapter 18. Ivy Wilson tells the Joads that he and his wife won’t be traveling further with them as Sairy is too ill to make it across the desert. This is a blow to concept of the larger family unit that the Joads and Wilsons formed while traveling the road together.