I feel like she is going a little too crazy over the sword, i'm suspecting her nausea was caused by either a poison or the witch, and I also feel that that is linked to her current bloodlust
The real question is... did Zhishu ever really get over Wenxu? In the story, he gets together with Dr.Ai, but they both yearn for each other in their hearts, through actions, and feelings. I hate that Wenxu only decides to change after he knows Zhishu has cancer.
Chowon deserves more, more than what any of them can give him. Sure, he made a bad decision, what else can he do? He was spoiled and didn't know the proper way to gain love and that led to desperate measures.
I feel like she is going a little too crazy over the sword, i'm suspecting her nausea was caused by either a poison or the witch, and I also feel that that is linked to her current bloodlust