Remember that famous line? “I am Heathcliff—he’s always, always in my mind—not as a pleasure, any more than I am always a pleasure to myself.” That’s not romantic—it’s terrifying. Catherine has merged her identity so completely with Heathcliff that when he disappears (and then returns full of vengeance), she literally cannot exist without him.
Her body rejects her marriage to Edgar like a bad organ transplant. She tells Nelly, “My great miseries in this world have been Heathcliff’s miseries, and I watched and felt each from the beginning.” So when Heathcliff marries Isabella and goes full villain mode? Catherine’s soul just nopes out.
DRAGON: Wuthering Heights / The tragedy of Heathcliff
The Baby Didn’t Help
Here’s the ironic part—Catherine has a fairly routine childbirth. The physical labor itself isn’t what kills her. It’s the aftermath. She wakes up, sees the baby, and basically says, “Eh, not interested.” She doesn’t bond with little Cathy. She doesn’t fight to live for her child. Instead, she rambles about Wuthering Heights and seeing Heathcliff by the window.
Her final moments are a masterpiece of tragic stubbornness. She tells Edgar, “I wish I were a girl again, half savage and hardy, and free—and laughing at injuries, not maddening under them.” She’s romanticizing her own death like it’s a glamorous escape.