The Viscount’s Wicked Wager by Collette Perri

Faced with a marriage arranged by her overbearing father, Olivia Whitby decides to make the best of the situation—until she learns that her betrothed is a cold-blooded scoundrel who only agreed to marry her because he lost a bet. With no viable way out of the engagement, Olivia is determined to despise her future husband . . . even if he is dangerously tempting.
Lucian, the Viscount Montgomery, is not the same man he was six years ago when he recklessly gambled over Olivia’s hand. He has abandoned his hedonistic pursuits, trading long nights partying for long days building his railway empire. Now one of the wealthiest, most sought-after bachelors in England, he knows he can give Olivia the life she deserves, if only the stubborn beauty would give him a second chance.

A whirlwind elopement and an unexpected kiss spark an uncontrollable desire, and Lucian resolves to do whatever it takes to possess his reluctant bride in every way. Unable to resist his seductive charms, Olivia finds herself in danger of losing her heart in what might just be the riskiest wager of all . . .