Back in the past...
Leng Tian never mentioned Leng San's mother even once. Even though Leng San tried to inquire, Leng Tian would find a way to change the subject and not mention her. Leng San was the eldest son, the successor of the Leng Family Leader, but he was not the only child of Leng Taoyang, the current leader.
Leng San also had two half-brothers. One day, at the age of ten, Leng San saw that people around him had their mothers taking care of them, but he did not know anything about his own mother, so he took the liberty to ask Leng Taoyang directly where his mother was. Instead, it provoked some anger in Leng Taoyang, and the answer he got was...
“You don't have a mother… don't ask me about this again.”