Nightbane (The Lightlark Saga Book 2) - Alex Aster - Bog

Isla Crown has secured the love of two powerful rulers and broken the curses that plagued the six realms for centuries, but few know the true origins of her powers. Now, in the wake of a crushing betrayal, Isla finds herself hungry for distraction, preferring to frequent Lightlark's seductive haunts instead of embracing her duties as the newly crowned leader of two separate realms.