Hearing her words, Tan Gengxin's expression froze. Originally, she thought it would be easy but she didn't expect Tan Xinyi to mess. For her, getting married to Qin was an opportunity. If she marries him, she can inherit the family head position.
Even if she has to give it to her son, she can still control him and let him do what she wants. Of course, she doesn't hate the family rather improving her family is her obsession. She inherits one of the family business and she was able to run it due to her love for family.
She could go to any extreme just to get benefits. Once she discovered a great business by the middle-class family. Originally, she asked the family to sell that business unfortunately they didn't agree. So, she went to the extreme and slowly killed the family members.