I'm with you in this one, but I thinl that maybe her goal was to frame the king all the time, because she knew very well how worng could this go, and its impressive how just 1 maid helped the princess to get ready to the marriage cerymon LOL
But I think KMW just want to the king take the blame before Qing and loose his power and even loose the throne, she put herself in danger knowing that would be exposed just to frame him.
Besides this ,for the actress acting I can't feel the mixed and complex feelings that a spy should have for loving the king she should be killing, you know? I can feel all of the complex emotions the king has for her(him), but I can't say it on the other hand and I think this make me not liking the couple as much as I could
[ sorry for the bad english, ENG is my second language]