Claiming Their Slave by Sue Lyndon

Though she dreamed for years of escaping her cruel master, Ava never expected that when she finally left her village it would be in the company of a huge, roughly-handsome barbarian who just purchased her at auction. Despite his stern demeanor and his promise to spank her for any misbehavior, however, her new owner’s firm-handed dominance arouses her deeply.
Jaxon has no intention of keeping Ava as a mere slave, but a human girl would not be safe on her own, and when she attempts to run away he takes her over his knee for a painful, humiliating chastisement. The fact that his strict correction leaves her soaking wet and quivering with need confirms that she will be a suitable mate, and before long she is writhing in ecstasy as she is brought to a helpless, blushing climax over his lap.
Upon arriving at the home shared by Jaxon and his brother, Ava is informed that the two battle-hardened warriors plan to claim her as their shared bride. Her mates make it clear that they will expect her complete submission and will not hesitate to punish her as thoroughly and shamefully as necessary to teach her obedience, but in spite of everything, will she soon find herself longing for the moment when they will claim her completely?