Of course, he only ever thought of killing her, but he never dared to act on it.
However, he heard someone in the company talking badly about him again. It pissed him off so badly that he shot his mouth off in front of Jonathan, saying he wished he could kill Jeanne's mother. That was when he got Jonathan's sudden approval, and Jonathan told him, "In that case, kill her!"
When he heard those words, the blood in his entire body went crazy.
Jeanne's mother had made him suppress himself for so many years! If she died, he could release all the grievances he had suffered all those years.
Only after he obtained his father's approval did he realize how much he wanted to kill Jeanne's mother.
Later on, he really did kill her.
When he saw Jeanne's mother's unrecognizable appearance, he felt a sense of joy. After so many years, she finally died in his hands; it was the ending she deserved.