Letting a minion do the dirty work only to throw him to the wolves when said dirty work causes unrest among your subjects is something Machiavelli would approve (The Prince, ch. 7).
it would be funny if MC had some truth revealing artifact and used it against the regent and he himself would end up revealing all the conspiracies he´s had against not only the demon queen but also the king...too bad its not gonna happen because of plot...
Wonder how long till he gives her the ring and says give it to the person you want. The prophecy just said he would save the demon race, not be her mate.