How did Cunxin keep Yang Jian?

She saved Yang Jian. According to the general routine, she should silently stay beside Yang Jian, accompany Yang Jian, soothe Yang Jian's broken heart and let him out of bereavement. But Inch-hearted clamored for Yang Jian to repay him for saving his life from the beginning. Later, she followed Yang Jian and found that Nezha, who killed her third brother in the East China Sea, was not dead, so she threatened Yang Jian with death and Yang Jian with saving Yang Jian's life. She wanted to kill Nezha herself. Yang Jian said that his life was saved by Nezha and he must be protected.