The Unmumsy Mum parenting blog changed Sarah’s life and was followed by three Sunday Times bestselling books. Now she joins us with her debut novel Stepping Up. At the centre is Beth, who has quit more jobs and relationships than she can remember. Then tragedy turns her world upside down, and she finds herself guardian to her teenage niece and toddler nephew, catapulted into an unfamiliar world of bedtime stories, parents’ evenings and cuddly elephants. Interviewed by Steph Douglas.