As much as parents love their children, there are moments when challenging behaviour pushes a person so close to their limit, it’s practically behind them. Comedian, actor and writer Anna Morris takes this premise as the starting point for her hugely engaging one-woman show. The spotlight also falls on the short-sharp nature of social media which leaves zero room for nuance, the sometimes inequitable nature of parenting, and how you manage your own problems in the face of another’s constant need.

When fearful flyer Marnie boards a long-haul plane home from holiday, she discovers that she and her four-year-old son are in economy, while her husband enjoys the free bar in business class. A couple of wines to steady the nerves later, a domestic argument and continual complaining from an over-tired little person sees her snap. Nothing spectacular about that, except she inadvertently drops the ‘c’ bomb, and a fellow passenger devoid of empathy decides to capture Marnie’s meltdown and post it online.

Without a single prop or costume change, sharing the stage only with a large chair, Morris holds us in the palm of her hand. Humour drives most of the show, with strong characterisation and well-crafted lines steadily building our intrigue. By the end, however, comedy has been swapped for something more heartrending and Marnie’s tale is a salient reminder that behind every gossip-inducing viral video lies a before-and-after we never get to see.

Son Of A Bitch, Summerhall, until 26 August, 6.10pm; main picture: Lucy Hayes.