At the time Mrs. Hongxia was pregnant with Liu Sizi, she did not know that the child was Liu Yingen's. She had always thought it was Old Hunter Liu's, as their marital life was very harmonious.
It wasn't until half a year ago that Liu Yingen discovered a mole in the crook of Liu Sizi's arm that was identical to his own, even in the same location.
Then, Liu Yingen confronted Mrs. Hongxia, asking if Liu Sizi was his son. He pointed out the mole on Liu Sizi and how much the boy resembled him.
Only then did Mrs. Hongxia realize that Liu Sizi was actually Liu Yingen's child.
Liu Yingen had no sons and, though he couldn't acknowledge Liu Sizi as his own, the fact that he had a son after all made him start treating Liu Sizi very well. He began sending any delicacies he had at home to Mrs. Hongxia so she could feed them to Liu Sizi.
