Is there something wrong with that woman cause at first I thought she was carrying for the prince to gain favour from the king but she is too obsessive about him and being his mother to be just trying to gain favour
so the adoptive mother tries to separate the actual siblings and wants to kill the actual sister of "her little boy"...
considering how competitive the harem usualy is thats just a bs development more likely than not she would be trying to get pregnant herself and off the prince
because she either becomes the empress dowager or she wont survive the emperors passing....