Ye [Jesus speaking to Edomite jews] are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning [reference to Cain, son of Satan/Serpent in Genesis], and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it.
Sure - think of Cain and Abel. One was the good side, one was the evil son...
But they had different biological fathers.
Abel = of Adam
Cain = of the Serpent
John 8:44 --