Her Duke at Daybreak by Wendy LaCapra

Infamous for his pedigree of madness and murder, the reclusive Duke of Ashbey believes he cannot feel until a mysterious woman unlocks a world of sensation in a single, shattering moment of connection. Ash casts a desperate bid for more. Recent widow Alicia Stone has long been reviled as the chief impediment to a love affair that captured the nation’s imagination. Publicly, she settled for respectability’s cold comfort, but, secretly, she longs to experience what she never found with her famous husband—uninhibited passion. When Ashbey proposes a discreet three-night assignation, Alicia shocks herself by accepting. But will their explosive union cost them both far more than they bargained?