Throne of Lust and Ruin by Ana Calin

Transylvanian witch writing dark and twisted fantasy romance. When you’re destined for each other – as fated mates and sworn enemies.
With a common rival sitting on the throne that was meant for one of them, Vyper the Queen of Spades and Ares the Scorpio King are forced to work together – as a fake couple. They will fight against the curse that had befallen their kingdom, and against the evil usurper that brought misery upon it. But, in the end, there can be only one on the throne of Celestia. Will Vyper and Ares be able to escape the dark prophecy surrounding their passion?