No, you missed the point. Of what VALUE is the information? Does he plan to run the guy off if he is NOT the biological father, despite his having stuck around through all the men that apparently run into (and out of) this woman's life?
If this man IS the biological father, does 2and2 plan to go tell his wife, thus destroying an intact family and making it likely that dad will discontinue contact with the kid?
Honestly, I am not looking at what benefits the original poster or the woman he is dating. I am thinking about what is good for the kid because the kid's needs are more important that everyone else at this point.