Hi MDS, Sorry to hear that you are going through these troubles. I sounds as if you are the "True" father in this case. I admire you for your love of your wife and the child as well. That is alot to be said for.
As for the deadbeat, the rules are the same here as well in Kansas, I am wanting to terminate my ex's rights as he is over 13k in debt in child support back payments this includes also terminating any past due debts. My problem is that I can't afford the attorney fees to get this done. Geezzz, anyhow and also for me to terminate his rights he has to have also abandoned the kids meaning absolutely no contact with the children whatsoever in any form for a mimumun of one year, which is not a problem for me either.
I think in your sitution its boils down to what you and your wife want to do. I can understand why you would want the deadbeat to pay off the debt. However, do you honestly belive he will all of a sudden reform and start paying child support and medical support payments after not paying for so long?
Personally I don't think the ex will reform at all. So then it boils down to what you and your wife wants to do. At this point there is nothing lost as you already have been paying for everything and have treated the child as your own. If anything you have gained from the entire situation not finicially but rather emotionally, mentally, phyically, and spirtually by benifiting of having a great wife and child you love very much. No amount of cash will ever be able to replace that.