Neither Jen and Luke think their siblings would turn them in, but Jen wants to know if Luke’s family’s poverty would change things down the line. Essentially, she suggests that Mark and Matthew might one day want financial relief more than they want to do the difficult work of sheltering their brother—an idea that seems to root in Luke’s mind, even as he tells Jen she’s wrong. It’s a sign of how important Jen’s friendship is to Luke that he thinks hiding is alright with a friend. She’s making his life livable right now—though the ominous ending here suggests his happiness will soon end.