Long Hao Chen
Long Hao Chen is her son. When Long Hao Chen was a baby, she left her husband and lived in the mountains with her son. The reason she did this was because she didn't want Long Hao Chen to be a knight like his father.
Feng Xiu is Bai Yue's father, though Bai Yue is unaware of that fact. Feng Xiu loved Bai Yue's mother and only saw her as his true partner. As a result, when Feng Xiu tells Long Hao Chen he's his grandson, their relationship becomes really awkward. That is why their relationship is very shaky.