Lucy Dickinson has a lovely husband, two sons and a busy job as a GP in a small seaside town. Of course, life isn't always perfect, but it's nothing she can't handle. Until she meets grace.

Grace is outrageous and attractive. But Grace's marriage is not all it seems, and her problems begin to affect Lucy. And what about Lucy's handsome and kind colleague Phil? Could he be more to her than just a mere distraction?

The discoveries that Lucy and Grace make about themselves, about intimacy, passion, friendship and the way eyeliner can change your life, reverberate through both their marriages.

If you've ever been tempted - you've probably reached that dangerous age...