Mad Wolf clearly knew that he was not Qu Shuangshuang's brother. Perhaps it was because of his arrival that Qu Shuangshuang's dearly loved brother was killed by him, giving him the chance to replace Qu Shuangshuang's brother.
He cautiously hid himself, fearing to exhibit any behavior that might make Qu Shuangshuang suspect he wasn't a child.
Because Mad Wolf was very afraid that Qu Shuangshuang would find out he was a wandering ghost reincarnated to occupy her real brother's body.
Mad Wolf believed that given Qu Shuangshuang's ruthlessness towards anyone other than her brother and close friends, she certainly would not forgive him for causing her brother's death.
Thus, Mad Wolf never dared to respond to Qu Shuangshuang's kindness towards him. He knew he was someone who desperately lacked love; even if Qu Shuangshuang was his mortal enemy, under her affection, he couldn't help but want to cling to her.
