Princess's Diamond Duty by Kim Lawrence

Saying yes...to his royal ring! Princess Elsie understands King Leandro’s proposal is pure convenience. Amidst political unrest, the fate of both their kingdoms hangs on a suitable marriage. Only, the fiery kiss they once shared haunts Elsie. She knows he can set her aflame and she’s tempted to let him! Leandro thought his father’s cruelty made him immune to love. But while he’s consumed with destroying his enemies, his free-spirited new queen slips beneath his impenetrable defences. As Elsie makes a stir at his palace — and in his bed! — the shackles on his heart begin to crack...