C17 I might be your father

"Are you our real dad?" Lee Mo asked, looking up at him and smiling like the Sunshine. He seemed ready to jump over to him and hug him.

Tim felt his forehead blank. What does Lee mean by asking someone he just meant for the first time if he is their real dad? Did he know a fake one before?

"Maybe I might be your daddy if the DNA proved that" Junxie Li replied, trying to smile