Secret Omega by Kellan Larkin

Mount Liberty is the only safe haven for omegas against the threat of invading alphas, but when Peregwin finds one battered and injured, he knows everyone deserves a second chance… even if it means risking exile if he’s found helping the alpha.
Stone was raised to see omegas as little more than slaves for an alpha’s pleasure, but Peregwin is challenging everything he knew about the world—and himself. He wants to prove that alphas can be loving protectors, but the longer he’s sheltered by Peregwin, the more dangerous it becomes for both of them… especially since neither can ignore the attraction burning between them.

Everything is at stake if Stone is discovered by the pack, but the secret becomes even more impossible to keep when Peregwin finds out he’ll soon have to explain his growing belly.