He stood as the parent to the children for years. I set out the applicable law above. The actions of the wife have no bearing on his obligations to act in the best interest of the children.
Wet I always love readig your posts, learn quite a bit and I appreciate you posting. So I understand what you say the law says, but as I mentioned before, the "father" stayed under falsified means. If he had know the truth when the children were first born he would have had the option to leave with no reprecusion. However he was lead to believe they were his children.
Like I said I know what you said the law states but in this case the law maybe a little off. Step-parents have paid support but they go in knowing what they are getting into, unfortunately this poor chap was lied to and thought he was doing the right thing. Had he left the mother when the children were born no one would hold anything against him, but because he stuck around under falsified reasons now he's the one go has to pay. Like others have asked where are the biological fathers?
Yes the children should be taken care for, but I feel for this guy it's a devistating blow.
Also the argument could be made that if he really loved them he would take care of them, but that should be his choice not the laws.