A nice and enjoyable Friday to you and your family. Remember not every sperm donor is a father. A woman might have sex with one man, then another or more. If she gets pregnant the man, she tells he is the father should feel honored because he was the one who cried out glory, making conception happen. He is also the one she loves. Do not doubt that you are the father because you had sex with her. So, mister you could only say you are not the father, if your sperms are dead. When the child is born, be a good, kind and loving father. It will bring joy to your heart in the end.