After all, Mrs. Cao is his father's legal wife. He has to come up with evidence to prove that Mrs. Cao is really that vicious a person; otherwise, his father will absolutely not believe it, and truly will not acknowledge him as a son.
And his father has always treated him well; even back when he thought about cutting ties with the Tao family, he never once considered disowning his father.
Besides, he wants his father to see Mrs. Cao's true face.
Otherwise, even if he didn't kill Mrs. Cao with his own hands, he would have already had someone secretly assassinate her.
The reason he hadn't touched Mrs. Cao all these years was precisely because he was collecting evidence to show his father, and at the same time to seek justice for himself and his mother. It's just a pity that when it came to poisoning, Mrs. Cao did it too cleanly; he hasn't managed to get a single piece of evidence.
This is Taoming Ye's truest thought.
