Vow of the Shadow King by Sylvia Mercedes

A treacherous bride. A heartbroken groom. Is their marriage over before it’s begun?

Her deceit discovered, Faraine finds herself trapped in the Shadow Realm at the mercy of her new husband. She’s surrounded by enemies, far from any allies, and her best bet for survival is to convince Vor to send her home.
But to do so means to give up on the alliance. Which would spell disaster for her people.
With the tremors growing worse and poison spreading through his realm, Vor is more desperate than ever to find a solution. Only, it cannot involve his wife. Vor wants nothing to do with the woman he has inadvertently married. At one time, he thought he might love her, but now? How can love flourish where trust is broken?
When circumstances require them to spend more time together, however, Vor’s blood is stirred in ways he doesn’t like to acknowledge.
Can two lost hearts find healing and hope in one another? Or is their love already poisoned beyond recovery?