history: During an argument, my wife told that I am not the real father of my son. I am so angry. During an argument_comma_ my wife told that I am not the real father of my son. I am so angry. That is horrible! Do you think it is really true_comma_ or she was trying to just make you angry? 
current: I don't know. I am thinking how I can verify that.
next: You can always try to get a DNA test.