The slave alpha and his princess mate

The alpha prince of Nehemedia pack was captured while running in the wood in his wolf form and sold to a human king.
He subjected him to different torture and pain in order to make the young wolf submissive to him.
For ten years, the prince was under slavery in the human world.
He hated them and kill any human who he lend his hand on.
One day, the kings daughters came back to the kingdom and was taken to the room where he was kept as a means of entertainment to them.
Unfortunately, the kings last daughter out of excitement of seeing a life wolf clumsily fell on top of him and was seized by him.
He felt elated, that the gods has finally answered his prayers by bringing his enemies to his feet.
At least now he could hit back on the king where it would pain him the most even if he has to die.
He was determined to kill her but to his greatest chagrin. She Is his mate.
How unfortunate!!
Knowing this , he was now left in a turmoil state.
what would he do?
Would he let her go after everything the king did to him?
Or would he get his revenge, even though she's mated to him?"