The Baron’s Halo by Jenna Jaxon

If love’s a game, he’s playing to win.

For reasons of her own, Isabelle Devereaux isn’t looking for a husband. Yet thanks to her mother here she is, in the middle of the social whirl of the Little Season. Thinking to refuse any gentleman who offers for her, Isabelle endures the lavish entertainments, saddened that she’ll remain a spinster.
Enter Baron MacKay, Sandy to his friends, in search of a wife to win a family wager. Dazzled by Isabelle’s beauty, he’s drawn to the vulnerable young lady. From the moment they meet, he charms her with his kind and generous nature until, against her will, Isabelle falls in love with him. Even though she knows marriage to him may end in disaster, she can’t resist his kisses…or where they lead.
Desperate to marry Sandy, Isabelle puts her misgivings aside, but circumstances spiral out of control as their wedding approaches. Isabelle must confront the demons that haunt her and make an agonizing decision: can she marry Sandy without telling him the one impediment that may shatter their happiness forever?