Throne in the Dark by A. K. Caggiano

SPFBO10

His dark destiny awaits, and nothing will stand in his way. Except her. Dark lord Demon spawn Prophesied realm destroyer With a demon for a father, Damien Maleficus Bloodthorne’s destiny could be nothing but nefarious, and with the completion of his most vicious spell, Damien is on the cusp of fulfilling the evil inevitability all of his dark machinations have led to. And then, her. Bubbly Obnoxious Blonde Harboring secrets of her own, a tiny yet troublesome thief calling herself Amma completely upsets Damien’s malevolent plans when she mistakenly gets chained to his side through magic, forcing him to drag her across the realm. Killing her would fix things, of course, but the nauseatingly sweet Amma proves herself useful on Damien's unholy crusade and then proves herself the source of something even more sinister: feelings. Will Damien be forced to abandon his villainous birthright to help the tender thorn in his side? Or will he manage to overcome the virtue Amma insists on inspiring and instead cut it out at the heart?