Alpha's Fated Bed Slave

As the last descendant of the werewolf clan, Gerardo O'Bound was guided by the werewolf book that he had to sex with as many as 50 virgins. Moreover, he had to kill the last virgin to obtain immortal blood
For Gerardo, it was not difficult to get a virgin. After all, he was a rich and powerful businessman in the modern era.
But the more virgins Gerardo had sex with, the weaker he became, and he had been addicted to violent sex when he met the fourth virgin Livanna Maria Thompson.
Livanna initially felt a lot of pain, but by the end of Gerardo's sex game, she began to enjoy every movement and lashing delivered by Gerardo. On the other hand, Gerardo was cold and only treated her as a bed slave.
What is the truth behind the scene?
What if Livanna's sexual relation severed for a secret purpose?
Read to figure out.