Her Sinful Duke by Daphne Byrne

“You will be begging me for a night of passion before the month is out, dear wife.”

Forgotten by her family and sent away to a nunnery, Lady Penelope has lost all hope for her future. Until her sister jilts the man she was supposed to marry. And now, Penelope must marry him in her place.
Everyone thinks Duke James murdered his family. And when his promised bride disappears, he refuses to let his reputation suffer another blow. So he demands to marry her sister instead.
However, Penelope has a condition for their marriage: she will not be his for a year. Even though James aches to corrupt his innocent wife, he accepts. But not without a kiss and a promise: by the end of the month, she’ll be begging for his touch…

*If you like a realistic yet steamy depiction of the Regency and Victorian era, then Her Sinful Duke is the novel for you.