How does Linda treat Willy? How do the boys feel about him? Is Biff trying to spite Willy? Why does Biff come home in the spring?

Linda is a caring and thoughtful wife, her concerns lay with her husband's health and how she can help him. The boys love their father, but they do not respect him. Biff comes home rather than stay at the ranch. He feels he ought to be doing something, and yet, he cannot bring himself to do anything.