Betrayed - Rhianne Aile

Will Northland's brother, Tristan, went to America to break a centuries-old curse and found love in the most unexpected of places: within the heart of a werewolf. When Will goes to visit, he meets not only Tristan's mate, Benjamin, but their friend Raul, who receives a plea for help from his old werepack: his twin brother, Richard, has gone missing and is possibly under the influence of a witch.
Raul leaves to find his brother, and Will goes with him, offering to use his magic to both locate Richard and protect them all from the threat of dark magic. But when they find him, a totally unexpected passion explodes between Richard and Will, stunning them both. Suddenly, discovering who betrayed Raul and Richard isn't the only challenge. It's now a struggle to solve the mystery so Will can claim Richard's heart just as the wolf has claimed Will as his mate.