Ye Kai then told Ye Xin that there was nothing like dual cultivation. Her strength didn't increase because of dual cultivation but lust system.
Ye Kai told her about Lust System and how he had conquered all potential women, and he also told her that this Lust System made her stronger when she had sex with him. However, Lust System didn't make him any stronger.
He told her about lust points, how he could earn lust points, and also that with lust points, he could become powerful. He also told a lie that he had conquered all potential women. Otherwise, he would die.
After that, he told her that he needed to have sex with higher cultivation than him to earn lust points. He saw that Ye Xin looked sad, but when he said her doing a threesome could let him earn lust points, even other women cultivated lower than him.
