The Rakish Duke and His Bride by Harriet Caves

Still reeling from her father’s death and kicked out of her home by his heir, Lady Nancy must save her family from ruin. So when the coldest of rakes offers her a marriage of convenience, she cannot refuse him.
Having lost his brother, Duke Richard never planned to be a duke or to marry. Despite the pressure of his new title, he vows to remain childless—no matter how alluring his bride may be.
It only takes a passionate kiss for their determination to crumble. And now, Nancy is about to realize how dangerous tempting a rake is…

*If you like a realistic yet steamy depiction of the Regency and Victorian era, then The Rakish Duke and His Bride is the novel for you.