Almost A Crime By Penny Vincenzi

Tom and Octavia Fleming have the perfect power marriage: he is a spin-doctor and she runs a consultancy to the charity industry. They are attractive, rich and successful. Then Octavia discovers Tom is having an affair, and both the discovery and the affair itself have consequences that are potentially fatal. For this is no ordinary affair, but one that leads to terror and danger, and threatens to damage people's lives for ever.