The Shadows by J. R. Ward — book slip

Trez "Latimer" has lived a life of shadows, hiding from a destiny he never chose. Sold to the Queen of the S'Hsibe as a child, he escaped to Caldwell, NY, where he became a pimp and enforcer.

His only constant has been his brother, iAm, who has always tried to protect him. But when Trez falls for the Chosen Selena, he faces an impossible choice: honor a pledge to mate the Queen's daughter or pursue the love of his life.

As tragedy strikes, Trez must confront his fate and find a reason to continue, while iAm considers the ultimate sacrifice for his brother's happiness.