The Marriage Wager — Jane Ashford

It was scandalous, to wager one's reputation on a hand of cards. But Lady Emma Tarrant felt she had no choice. She had watched her husband gamble his life away, and when she saw another young man losing heavily, she was determined to save him from a similar fate. So she challenged the scoundrel who held his debts to the one thing she knew he could never refuse: another game.

After eight years of war, Lord Colin Wareham had returned home a changed man ... still handsome, still wealthy, but weary, impatient, restless. Then a furious beauty with pale gilt hair dared to accost him, and Wareham found himself suddenly intrigued -- and aroused. So he named his stakes: a loss and he'd surrender the debts. A win, and the lady must surrender herself ....