The subject Incest is portrayed in V.C Andrews adult fiction novel Flowers in the Attic in a very subtle manner. Cathy Dollanganger develops an incestuous relationship with her older brother Chris after they are locked up in attic for 3 years.
The novel Mists of Avalon written by Marion Zimmer Bradley reverberates with this theme. Half siblings Arthur and Morgaine have committed incest unknowingly. The inbreeding led to the conception of Mordred. Morgaine tries to hold back when she learns that Arthur is her sibling. However, Arthur finds it hard to resist. Gwenhwyfar, Arthur’s fiancé was raped by a man who claimed to have the same father.