Du Fei was indeed a very cautious person. Being in the Energy Shaping Seventh Realm, he could just head over and kill the two. However, he chose not to. All warriors had great hidden potential within them. This was even more so when a warrior was unleashing a final attack without care for his own life. At times like that, a warrior would be able to erupt with a strength far surpassing his level.
Therefore, Du Fei was waiting for the poison in Ye Mo to take effect. When that happened, success would be guaranteed. However, Yun Chuchu was completely clueless. She helped Ye Mo to a tree and let him use her thighs as his pillow. Anxiousness covered her face as tears rained down without stop.