The Lady Forfeits by Carole Mortimer

Lady Diana Copeland has hot–footed it to London to tell her new guardian, Lord Faulkner, exactly what she thinks of his outrageous marriage demands! Well, with her two flighty sisters having run off, no one else is going to do it.... Surely this magnificent man with a naughty glint in his eye can't be the pompous old fool she was expecting? Inhaling deeply, Diana fights not to get lost in the depths of Lord Faulkner's intoxicating gaze...or to make the worst forfeit –– by agreeing to be the lord's new countess!