Precious Time by James Erica

In order to spend more time with her four-year-old son Ned, Clara Costello trades in her secure, well-paid job and sports car for a camper van called Winnie, and the three of them set off on a mystery tour of England. Of course, her friends and family think she's gone mad. But when they arrive in Deaconsbridge, a small market town on the edge of the Peak District, Clara and Ned become drawn into the lives of the locals. Two in particular seem destined to get under Clara's skin—Gabriel Liberty, a cranky widower who terrifies his family, and Archie Merryman, a local dealer in second-hand furniture, who possesses a heart of gold. Then Clara finds herself having to confront a problem much closer to home, and one she had hoped she would never have to face.