since im an expert on all those royalty eras after reading a lot of those type of manhwa and manga,i know for a fact that the maid shouldn't be smiling at the king since it is considered rude due to the social status. Moreover, when a concubine give birth,or even the queen or empress, there would be no other concubines and guards in the room.There will only be the maids and sometimes the king will attend.And the thing that irritated me the most was the mc accepting or conclude that she was reborn only after a few seconds like,wth?!How does that even make sense?!?!