- BrotherSister Incest: the entire premise of the movie.
- Love Hurts: Especially incestuous love!
- My Parents Are Dead: Natalie and Richard's parents.
- Old Money: Sinclair's family.
- Same Story, Different Names: Expansion of Poliakoff's 1970s TV play Hitting Town.
- Your Cheating Heart: Richard and Natalie, even though Sinclair forgives them at the end.