If she continued to stay in Ping Cheng, Qiao Nan was afraid that her affairs with the Qiao family would become more troublesome. Her father already knew that she was back. It was hard to say when Ding Jiayi and Qiao Zijin would find out as well. She didn't want her trip to Ping Cheng to become her nightmare.
In front of the Zhai family, she was naturally unwilling to let the Zhai family see her in a sorry state, even if she had just accompanied Zhai Hua through one of the darkest periods in her life.