"From the moment you underestimated his strength, your fate was sealed. After we captured Chen He, my husband had been biding his time, waiting to give you a taste of your own medicine."
The second mistress wanted to use Chen He as her trump card, gaining leverage over Yu Jingting, having him under her thumb from then on.
After being seen through by Yu Jingting and his wife, Chen He began to turn the tables. He used the second mistress's plot to dupe her eldest son.
Meanwhile, the second mistress took advantage of the time when Chen Lijun was getting married, attempting to persuade Fan's mother to poison her. She prided herself on the secrecy of this scheme, not knowing that Chen He had already been won over by Yu Jingting.
Although Chen He couldn't confirm that this plan was the second mistress's work, Suizi and her husband were cunning and cautious. They boldly hypothesized and carefully verified, eventually concluding that it was indeed the second mistress's doing.