Catherine fell ill, gave birth to a daughter and died.

Catherine fell ill, gave birth to a daughter and died. Soon after, Isabella fled to London and gave birth to a son named Linton, after Heathcliff's parents. He was holding the child there with him. Thirteen years passed when Nelly Dean served as the caretaker of Catherine's daughter at Thrushcross Grange. Young Cathy was beautiful and headstrong like her mother. Young Cathy was growing up on the Grange with no knowledge of Wuthering Heights; But one day, while wandering the steppes, he discovered the mansion, met Hareton and started playing with him. Shortly after, Isabella died and Linton began living with Heathcliff. Heathcliff was treating his sick son even worse than he had treated his mother. Three years later, Cathy met Heathcliff on the moors and traveled to Wuthering Heights to meet Linton. She and Linton began a secret romance conducted entirely by letters. Nelly destroyed Cathy's letter collection. Later, the girl started sneaking out at night to spend time with her thin young lover and asked her to come back and restore her health. However, it turns out that Linton only treated Cathy this way because Heathcliff forced him to do so. Because if Heathcliff, Cathy, and Linton were to marry, the inheritance on Thrushcross Grange would be hers legally, and Edgar would have taken his revenge on Linton.