Li Lu and Xu Jiaojiao didn't want to just leave like this, especially since they weren't sure if Gu Xiaonuan had returned to normal.
If Gu Xiaonuan hadn't returned to normal yet, then who could be sure that Si Yuchen's presence wouldn't upset her?
Gu Xiaonuan's emotions are already very unstable, and if she were to be upset again, how much time would they have to spend to soothe her?
Xu Jiaojiao suggested waiting until Gu Xiaonuan felt like talking before they left, which would also ensure that Si Yuchen wouldn't complicate matters further.
Moreover, Xu Jiaojiao keenly observed that Si Yuchen's emotions were unstable, which wasn't a good sign.
If he couldn't even stabilize his own emotions, how could Si Yuchen handle his issues with Gu Xiaonuan? After all, the person who is most deeply hurt right now is none other than Gu Xiaonuan.
Gu Xiaonuan must also understand that she shouldn't fall into despair so quickly when she hasn't figured everything out yet.