Are we absolutely sure, that if OW is in fact pregnant, that your H is the father? I can't recall my ATTY's exact words, but he mentioned something about a law being passed not too many years ago regarding paternity tests being done at the time of birth. I certainly wouldn't have H put his name on that birth certificate without concrete proof.
Getting over a painful experience is much like crossing monkey bars. You have to let go at some point in order to move forward. ~ Joseph Campbell