Susan Lewis 
Cruel Venus 

Allyson Jaymes has it all — celebrity, power, and a glamorous marriage. Until her world is destroyed by the bitterest betrayal of all: her husband»s explosive affair with her 19-year-old assistant, Tessa Dukes.
Tessa»s ambitions burn fiercely. Her chilling manipulation of fame and her steady destruction of so many dreams and ambitions lead all concerned into a fatal minefield of sexual obsession, psychotic jealousy and deadly treachery.
Moving from the dazzling, yet sinister, lights of London, to the deceptive haven of Italy»s romantic Amalfi Coast, Cruel Venus is a suspense-filled story of love at its very best — and absolute worst.