Too Many Family Links

As you read the book, you begin to see how many of the main characters actually fall and in love (and some actually marry) their own relatives. I think this is scary and disgusting but apparently, the characters aren't relaly bothered. Young Catherine marries both her cousin Linton and her cousin Hareton (at different times of course). Also, Heatcliff marries Isabella who, to him, is the sister-in-law of the woman he loved. Ew!