guys who is the real mom of the kid

Cheng liyue she was drugged and slept with the CEO to forcefully make her divorce her ex husband. She didn't know the real dad and was left to raise the kid by herself. Her son went looking for someone to make her happy then realize he takes after the CEO looks then claimed to be his son. He even took a strand of his hair and gave it to him to do a DNA test. Then realized the woman he was looking for was her.