His Brother's Omega

He is an Alpha wolf bound by duty and honor. She is the one woman he can never have: his brother's fated mate. Thorne Silverfang has spent his life in the shadows, his loyalty to his pack and his Alpha heir brother, Ryker, the very backbone of his existence. But when Ryker brings home the exquisite Omega, Seraphine, Thorne is confronted with a tormenting desire he cannot control. Her scent is a hypnotic call to his most primal instincts, a sinful melody that promises to shatter his ironclad will.
Now, Ryker must leave on a perilous mission, entrusting Seraphine's safety to the one man he trusts above all others: his brother. Left alone with the woman who haunts his dreams, Thorne is plunged into a savage battle with his own soul. As Seraphine's heat approaches, their forbidden attraction becomes a thrilling, palpable force that threatens to unleash a catastrophe. Every stolen glance is a spark, every accidental touch an inferno.
When loyalty turns to lust, and a sacred duty becomes a scandalous secret, will Thorne honor his blood oath or will he surrender to the wild, wanton urge to claim his brother's omega for himself?