We say that the offer of becoming emperor is tempting, but that the idea of spending eternity as her divine plaything is far more pleasant. Yet, we wish our offspring to have the dynasty in our place, so that they may offer up continual devotion and praise to her on earth while we remain slave to our undying love for her in heaven. Ask for ten years. During that time, Shun will abdicate the throne to us and reveal his duplicity in faking his father's death, setting right the blasphemy and making it known that heavens rule is not to be mocked. He will be exiled to maniac island, along with his whole household. His bloodline will die a quiet death there. Or, if it pleases her, we will kill him now, but as her pet an devoted servant, we'd ask her mercy towards us in this so that our eternal love and devotion toward her is not marred by feelings of bitterness.
Edit: per baltika's suggestion, we'd also add that regardless of her of whether or not she would grant us our humble suggestion, we'd beg the honor of her embrace now as it is painful for us to restrain ourself from her great beauty - though only if she desires it.