The signs are glaring, a figurative and literal Chekhov's gun, it's a car crash in slow motion and you can't look away.
There is a heartbreaking inevitability to Florian Zeller's play The Son which is currently on at the Kiln Theatre.
Nicolas (Laurie Kynaston), a once bubbly teenager has become withdrawn since his parent's divorce. He lies, skips school and his behaviour has started to frighten his mother Anne (Amanda Abbington).
Moving in with his father Pierre (John Light) and new wife Sofia (Amaka Okafor), it is hoped, will return him to his old self.
Denial or ignorance?
Anne talks about Nicolas being ill, his father believes it is 'a phase' but whether through denial, fear of stigma or ignorance neither addresses what is obviously wrong with their son.