Who is Myrtle Wilson? Dalsy's sister Tom Buchanan's mistress Nick's ex-girlfriend Gatsby's former lover

Myrtle Wilson is Tom Buchanan's mistress. In F. Scott Fitzgerald's novel "The Great Gatsby," Myrtle is a working-class woman who becomes involved with Tom while he is married to Daisy Buchanan. She is not Dalsy's sister, Nick's ex-girlfriend, or Gatsby's former lover.