What started as instinct spirals into obsession.

Baz thought leaving home was the right thing to do. He had to keep his distance to protect his sharp-tongued, bright-eyed younger brother—because spending too much time with him awakened every filthy, possessive alpha instinct Baz swore he’d never act on.

One heat-filled phone call changes everything.

Altair never expected to present as an omega after his type-test came back inconclusive. Now his body is on fire, his heats unpredictable and all-consuming—and the only thing that eases the ache is his strong, dependable older brother’s rough voice, laced with desire, wicked in his ear, coaxing him to climax.

Lines are crossed. And once they give in, there’s no going back.