Raven, Part Two by Piper Scott

Bertram Drake, international man of mystery, leads a double life. By day he is the council’s most valuable pawn, but by night he is a traitor, aiding and abetting the dangerous leader of the organization looking to undermine dragon society—a man who goes by the name of Raven, and who is none other than the father of Bertram’s children and his beloved mate.

Kept from his family by his dangerous wild magic, Sorin is a man on a mission. As Raven—the leader of the Vanguard—his life’s purpose is to save and rehabilitate the omegas being mistreated by their cloisters, but when an unexpected discovery puts all Pedigree omegas in mortal peril, his goals shift. He must do whatever it takes to ensure no omega ends up suffering like him.
Even if it means playing the part of the villain and severing ties with his mate.