Question

why do heathcliff and catherine quarrel?

Answer 1

heres a summary-Nelly ventures back to Wuthering Heights to talk with Hindley; instead she encounters Hareton, who has no memory of her. Hareton greets her with a barrage of stones and curses — actions he learned from Heathcliff. When Heathcliff appears, Nelly runs away.

The next day at the Grange, Nelly witnesses an embrace between Heathcliff and Isabella. When Catherine confronts Heathcliff about this, he tells her "I'm not your husband: you needn't be jealous of me." This leads Heathcliff to reveal that he knows Catherine has wronged him and that he will be revenged.

Edgar confronts both Catherine and Heathcliff. Catherine ends ups locking the door and taunting her husband into a fair fight between Heathcliff and himself. Edgar ends up hitting Heathcliff in the throat and rushes off to get assistance. Realizing he cannot fight three men with weapons, Heathcliff leaves.

Edgar then demands that Catherine choose between Heathcliff and himself. Catherine doesn't answer. Instead, she locks herself in her room, refusing to eat for two days. Unable to get through to Catherine, Edgar informs Isabella that if she were to pursue a relationship with Heathcliff, that action would signify the end of their relationship.