The Innocent's Dark Seduction (Harlequin Presents) by Jennie Lucas

Roark Navarre is ruthless and relentless. He wants beautiful Lia, and he will have her! When he discovers that she is a virgin, taking his prize becomes even sweeter. But the innocent's dark seduction has only just begun!Many years ago, Lia was the innocent victim of Roark's merciless financial ruin of her father. But it's too late for regrets—soon she finds she's carrying his child. She doesn't want Roark, her bitter enemy, to know. Because surely he will do what he's always done—exact his price!