The Invite welcomes heterosexual polyamory into cinemas. It’s about time

As a non-monogamist, it’s refreshing to see a film that reflects modern attitudes to non-conventional relationships, instead of using them as a punchline or cautionary tale What is the chief obstacle that must be overcome in most modern-day big-screen romcoms? Lack of attraction? Misaligning schedules? Or, perhaps, heteromonogamy? If that wasn’t the dominating norm of human relationships, many movie plots would be much swifter to resolve. What if Elizabeth Olsen didn’t have to choose between Callum Turner and Miles Teller in Eternity? Or Twilight allowed Bella to be in a throuple with Edward and Jacob? Even though both films have fantasy narratives, their predestined outcome is as real as it gets – a man and a woman (re)marry and live happily ever after. For a long time, alternative relationship structures were relegated to fan fiction, undeserving of mainstream fictional representations where conflict and resolution are both inscribed in coupledom. Even the films that challenged mononormativity, such as Bob & Carol & Ted & Alice, sustain the cautionary tale: opening up your relationship will eventually break it. As a practising non-monogamist, I yearn to see my values repr