Imperial Twist by Jessamyn Kingley

Imperial Duke Damian Draconis has always known he would have two mates. His whole life, he’s yearned to prove to his parents and the world that such a match is not doomed for failure. His household is brimming with happy couples, and he wants the same joy in his heart—but on his own terms. Consumed with his desire to challenge the unfair assumption that his goal is foolhardy, he’s convinced it takes only determination to succeed.
A walk into a dingy coffee shop proves that Fate does indeed have two men in mind for him, and Damian moves forward with soaring resolve. Though all is not as it seems, with some convincing on Damian’s part, the three men come to an agreement to proceed. But right from the start obstacles make themselves known, pushing them to the brink.
Damian soon learns that what you want isn’t always what you need, upending all he thought he knew. He never imagined nor is he prepared for the way his true mate lights up his soul. In the end Damian will find that determination is not everything, and sometimes you must ignore what Fate wants if it means following your heart.