Mrs. Zhao was an exceptionally astute woman. Starting from a peasant girl with no background, she used her own means to step by step actually come out on top in the Zheng Mansion, even superseding the First Madam, who came from a wealthy merchant family.
To have a concubine surpass the wife was not something an ordinary person could achieve; it required considerable skill.
And she had done just that, naturally, she was no ordinary woman.
She keenly detected that hint of unusual color in Feng Xuan's eyes.
Men are a strange sort of animal. They are very combative and after winning a fight, they all like to show off a bit.
Others might not know the relationship between Feng Xuan and Zheng Chuan, but Mrs. Zhao did, and she could guess that Zheng Chuan's death definitely had something to do with this uncle.
It's quite possible that he was the one pushing things from behind.