The Pleasures of Passion by Sabrina Jeffries

When Niall Lindsey, the Earl of Margrave, was forced to flee after killing a man in a duel, he expected Brilliana Trevor to wait for him. Seven years later, Niall has returned, disillusioned and cynical – so being blackmailed by the government into helping his former love catch a counterfeiter connected to her father doesn’t improve his mood.

The now widowed Brilliana wants nothing to do with the reckless rogue who she believes abandoned her to a dreary, loveless life, but she will do anything to save her father. Yet as their fake engagement brings long-buried feelings to the surface, can she let go of the old hurt and put her pride aside? And will the pleasures of their renewed passion enable them both to rediscover love?