Well, perhaps the story is set in a world where there are both kingdoms and packs. The king's wife might find herself in an unexpected situation where she discovers she has a special bond with an alpha. This could create a stir in the court as well as in the pack. Her loyalty would be tested, and she might have to make difficult choices between her life as the king's wife and her new - found connection with the alpha.
It could be that the story delves into the complex relationships between different power structures. The alpha represents the power within the pack, and the king represents the power in the kingdom. The king's wife being the alpha's mate might be a catalyst for a series of events that aim to either bring the two powers together or drive them apart. Maybe there are secrets about her past that are revealed, and this connection was somehow fated all along. There could be characters who oppose this union, and those who support it, leading to a web of intrigue and drama throughout the novel.
I'm not sure exactly as I haven't read it. But from the title, it seems that there might be a love triangle - like situation where the king's wife has some sort of connection or is the mate of an alpha, which would likely lead to a lot of conflict, both political and personal.