Cloaked in Blood (Wulfkin Legacy);

The daughter of a sultan alpha, Selena Kurt agrees to an arranged wulfkin mating to protect her sister from a dangerous alpha from the enemy clan. To her surprise, her match is Marcin Ulf, the next in line for the Hungarian throne . . . and the wulfkin who broke her heart years ago.
  
Marcin is just as shocked to learn he'll be matched to the enemy's daughter and the woman he's never forgotten. Before they can be paired, however, they're drawn into a tournament where Marcin will compete to free his estranged imprisoned brother, while Selena battles for the life of another wulfkin alpha. Both intend to seize this chance to save those they're fighting for - even if it means facing off with one another just as their romance rekindles.
  
Will tribe loyalty triumph, or will they realize they're better off as a team before it's too late?
  
Sensuality Level: Sensual

  
Cloaked in Blood is Book 3 in the Wulfkin Legacy series, but can also be read as a standalone book.