The physician who entered greeted the Emperor and gave a lengthy congratulations and informed that the Noble Consort is PREGNANT. He also insinuated the fact that it is a miracle, since it is only been less than two months since the Noble Consort had entered the palace and most times you could detect pregnancy only later.
Rijun became skeptical of this doctor' s intentions as he is leading the Emperor to believe that the Consort was already pregnant before entering the inner palace and in that case the entire family will be persecuted for cheating on the Ruler of the land. But his sister cannot be pregnant! He is lying.