Truth

Song Yan had no intentions to tell Ji Zhuang Guang and Ji Nan about Xue Ping's identity as these two might end up slipping in front of Xue Ping but if she did not alert them then these two men would end up dying in the hands of Xue Ping. 

She did not want these two men to die because if they died then Xue Ping would only become more and more obnoxious and arrogant especially if all the three heirs of the Ji family were killed off. If that happened then their parents would never believe that the woman who was the only heir after the death of their three sons was an imposter.

Ji Nan was scared silly by Song Yan's words. His vision turned dark and the defenses that he had raised shattered completely. His face was paler than moonlight as the veins on his neck bulged in agitation and anxiety. " How …How is this possible? How could this happen!?"