The Darkness Within Us by Tricia Levenseller

Beauty conceals her. Secrets imprison him. Will their rivalry destroy them?Chrysantha Stathos is no stranger to deception.

By disguising her intelligence and ambition she has become a duchess. And, once her elderly husband dies, she will be one of the wealthiest women in the kingdom. Or so she thought...

Eryx Demos claims to be her husband's estranged grandson - the lawful heir to the fortune she is desperate to obtain. But behind his handsome façade lurks a dangerous secret: one that Chrysantha will stop at nothing to expose...