...since she is divinely chosen to lead.
Who wouldn't wanna swear fealty to DAT ASS, right fellas?
Have the consort quietly executed upon confirmation that the queen is with child. No one can know the sordid truth...
Also she has grown cold and distant as the power of her position became normalized in her mind. She is cruel to her subjects and even crueler to those closest to her. Lavish praise on her - do not give her even an inkling of a reason to be displeased with you, lest your head be separated from your body as punishment for a perceived slight.
Better them than you.