Seahorse, The Witch Strikes Back

Five years of powerful witch Kara's life were devoted to Austin, King of the Seahorse Kingdom, sealed by an unbreakable blood pact. Her world shatters when she discovers him with his maid, Lilith, who Austin impossibly claims is pregnant with his child. Humiliated, Kara destroys their pact, unleashing a deadly curse upon him. Unbeknownst to Austin, Lilith is a brutal Megalodon Merman spy, intent on the kingdom's destruction. As the realm crumbles under rising threats, Kara aligns with Kassel, a legendary, exiled Seahorse War God, returned with an army thirsting for vengeance. Austin will realize Kara's true love too late; the queen he scorned returns not for affection, but for his throne.