I agree with the others that you need to retain an attorney to help you with this. It will save you money in the long run, rather than continuing to pay double child support for the same child, as well as the headache and heartache involved. Before taking this child into your home, I would suggest a dna test if that hasn't been done already...it seems very odd that the mother didn't even tell your husband that the little boy existed until he was 12 years old?? Is your husband's name on the birth certificate? Is your husband 100% sure that this is his child? Sounds like he and the mother were very young when the baby was conceived, and she could have had multiple partners. I would make sure you address it in a VERY sensitive way with the young boy...not as in "we think you're not ours", but rather "we know you are our son, but need to get this dna test on file so that legally there can never be any question, no one can ever take you away from us, etc." Before bringing him into your home, getting more attached to him and letting your children get attached to him as a brother, make sure he is really yours legally or else the mother could step in later and never let you see him again and that's not fair to the young man or to your other children. Most of all, this boy is going to feel a lot of rejection being sent to a virtual stranger by his mother, and he will need a lot of love, patience and understanding. He is still young enough that he can turn around and you can make positive changes for him, but it will not be easy. I would recommend 100% the "Parent Project" classes offered through local law enforcement agencies. These are amazing classes that give you tools for dealing with kids & teens who are acting out, having problems in school, with drugs or alcohol, any type of challenging issue. They are very inexpensive (I think you only pay around $30?) and VERY effective, I have seen first hand. God Bless You for stepping up for this young man!! I think that loving, caring step-parents are some of the most under-recognized, under-appreciated parents out there! But once the "step-children" grow up and are mature enough to see how well you treated them, sacrificed for them, loved them for all those years when they weren't that "lovable", I think you will have a fantastic, close relationship, and you most certainly will reap those rewards in Heaven :-) When you are ready to pull your hair out with this teenager, and no one appreciates all you do, remember that God sees all, and He says that we reap what we sow, both the good and the bad...
God Bless You,
A.