Fallen Shadows by Lynn Hagen

Two thousand years ago, Izel was supposed to take over as tribe leader, but his life is cut short when his very own father kills him. Now Izel has been reborn as one of Jaden’s reapers, given another chance at life.
Kidnapped and attacked by a madman, Orion is determined to put his life back together, but that’s hard to do when his mother wants to wrap him in cotton and keep him from ever leaving the house again.
Duncan envies what two of his brothers have with their mates. He wants someone he can share his life with, someone who will look at him like the way the mated men in the house look at each other.
When the three finally meet, all hell breaks loose. Maybe fate got this mating wrong. But when an ancient creature targets Orion, they have to work together to not only save their mate, but their relationship, too.