The Wolf’s Demand by Maggie Ryan

When twenty-four-year-old Cassandra Ambrosia threatens to leave her husband in a reckless test of his love, the last thing she expects is for the huge, handsome beast of a man to strip her, spank her, and then claim her more thoroughly and shamefully than she would have thought possible.
Cassandra made a vow, and her husband plans to make her keep it. He has been gentle, but now he will teach her what it means to belong to an alpha wolf. She will obey him or be punished.

As her mate masters her beautiful body completely, taking her as hard and often as he pleases, Cassandra’s passion is rekindled and soon burns hotter than ever. But her rash words unwittingly triggered an ancient curse which has plagued the Ambrosia family for generations, and with a terrible evil closing in, the entire pack will have to stand together if they are to survive.