Isabella's son Linton is not Heathcliff's biological son.
Isabella conceived him after she ran away. How many times does Nelly Dean observe that the blonde Linton looks nothing like Heathcliff? Heathcliff was content to take advantage of Isabella's infatuation with him to further his revenge schemes against Hindley and Edgar, but he also made it very clear to Nelly that he completely despised her, so in spite of the possible Fridge Horror
, it doesn't seem likely he would ever have wanted
to invoke the Marital Rape License
against her. Of course, Heathcliff wouldn't tell anyone this because he needed an heir to complete his schemes of defrauding Edgar and Cathy (II) of their land.
- Oh, I think Heathcliff is the kind of guy who would definitely get a kick out of raping someone he despised.