Overthinking, coupled with depression, led to insufficient breast milk production. My mother-in-law was very anxious and, holding back her frustration, came to chat with me.

I decided to take a gamble and asked her if she knew Dai Qingshu.

"Hmph. Why are you bringing him up? His business with Xiaoyu has long been over."

In a flash of insight, I immediately got my mother-in-law's meaning.

What she meant by "over" was that Dai Qingshu and Gu Qingyu had a past, a relationship?

If understood this way, everything made sense.

In a hidden, illicit relationship, the one who was abandoned bore a grudge and sought every possible way to take revenge on the other.

My poor sister might have committed suicide, or maybe she was murdered.

The person who might have killed my sister could be Gu Qingyu or Dai Qingshu.

The same "suicided" ghosts, Gu Qingyu and Dai Qingshu, both have the suspicion of murder.

Crazy thoughts kept surging in my mind, lost in reasoning and unable to extricate myself.

I've gone mad, I must be going mad!