Madness and Gods (Blood of Titans: Reforged 3)

The war against the gods was just the beginning

Mending the world unleashed chaos. With Alea and Arman gone and the queen dead, Athrolan faces civil war. The kingdom fractures between two heirs—the disinherited and senile Daymir Blackhouse, and the Dhoah’ Laen’s rumored child. Except Alea’s mad son never knew of the power in his veins. Imprisoned in Ban, which teeters on the edge of its own war, his fragile mind may not survive the week, let alone a battle for the crown.
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Rih, the soldier who found him and daughter to the Banis emperor, sees more than an enemy in Athrolan, and uses her inability to speak to burgeon her growing rebellion. Whoever runs from the crown faster—and survives their bloodline’s curse—will determine the Athrolani heir.

This is the third book in a series, and is improved by reading the first two, however they do not have overt on-page rep of queer characters