Monster by Francette Phal

Accidental Gold digger.

Circumstance forced Eden Mercer to sell herself to Dominic Armstrong for half a million dollars and in return she is to play the dutiful wife in public and submit to him completely behind closed doors.

The Tyrant.

Dominic is Ruthless, manipulative and sadistic but Eden is determined not to break under his cruelty. But how does one persevere when in the clutches of a Monster?