Stealing Fire — Angela Castle

Sequel to Blue Fire: In the land of the Kell, Tuthal and Tamara are content in their new relationship, until Tuthal uses Tamara as bait to steal back the soul he sold long ago.
Adalardo, King of Kell, has found his queen in Penny, an abused housewife from Earth. Adalardo must challenge Penny's husband in order to claim her as his queen.
The soul demon, who is angered over the betrayal of Tuthal, seeks revenge, targeting not only Tuthal but all those around him.
When the demon strikes a blow right into the heart of both men, they must join forces in hope of defeating the evil that has taken their women.