Taken by the Prince by Christina Dodd

Lovely Victoria Cardiff is very prim, very strict, very sure that England is the only civilized place in the world.
She's about to find out she's right.
Only Victoria knows the truth about dashing, dissolute, dangerous Saber Lawrence--that he is a renegade prince plotting to seize control of his country. To ensure her silence, Saber kidnaps Victoria and carries her away to his castle deep in the woods. There they hide the truth about their past: a glittering ball, angry words, a passionate kiss. He vows to vanquish her reserve ... but soon finds an English governess is not so easily seduced ...
Between persuasion and passion, they realize that only together can they defeat the enemies determined to destroy them. But will Saber discover too late that a woman's heart is a treasure more priceless than any kingdom?