To all those who are confused about this chapter, let me tell you something,
I'M JUST AS CONFUSED AS YOU!
The exposition of the story has gotten worse than before and there is nothing we can do about it
It's becasue the manhua leaves out a lot of things from the novel thus making the story confusing
for those who are confused here is a summary of this scene from the novel:
Chen Shi's brother is trying to save his sister by buying medicine from Yuheng's store, where not only is he charged an extremely high amount of silver but later, when he is trying to send someone to deliver the meds to his sister Yuheng actually goes to her court yard to steal it again, just to sell it back to them. By then Chen Shi is so sick that her organs are shutting down and dies for the loss of medical attention and the beating she got from her husband's hidden guards.