None of the characters in this novel was particularly pleasant: bullies, doormats, users with little excuse for their behaviour or feasible explanation were the main protagonists. In the background there were parents demonstrating some kindness, but this was overlaid by the behaviour of their off spring. Somehow, Scanlan failed to give any of them any warmth.
Heather, with all the signs available to her, works a full day in her partner's business and returns to her flat to prepare his meal. he moves between her flat and his father's home to sleep - surely there should be a clue to his lack of independence in this? But no, Heather is oblivious until a friend tells her is not to be trusted. Laura has no redeeming features, and the explanation of her inability to form close relationships does not ring true. Ruth, Heather's twin is possibly a positive character - but her case is weakened by the level of her punishment of Heather's erring partner. Noreen is a bully to her weak and indecisive husband, although Scanlan does her best to find reasons for the behaviour of both.
And this is the problem. Scanlan does not spend enough time working through her characters to give them any depth. They provide a story that is fine for a quick read on the beach, but little more.