The Wicked Baron — Sarah Mallory

When Luke Ainslowe returns from his lavishly opulent lifestyle in Paris, his reputation as an expert seducer of women precedes him. The ladies of the ton are torn between scandalized outrage and the desire to become mistress to the most dashing rake London has ever known....

Innocent Carlotta Durini refuses to become the baron's next conquest. For she lost her heart to Luke once before, and now believes herself impervious to his lethal brand of seduction. But what if the Wicked Baron refuses to take no for an answer?