I have a 6 year old son by a boy that has nothing to do with him he lives 2 hrs away and never sees nor calls him his mother has been giving me 200dollars a month for 4 years my husband wants to adopt my son we have a 4 year old together and my 6 year old has called my husband daddy since he was 1 can I take his biological father to court to get him to sign over his rights? My son wants to be a muse just like his mom dad and brother I want him to feel like he is the same as us!

The bio father has to sign papers. Adoption takes time, has fees, and really requires a lawyer. If the father's mother is sending money, she might be glad to be free of the obligation she feels on behalf of her son, or she might object, and her son might therefore object. You really need to find that out first by asking him.

You are going about it backwards. File for adoption. As part of the adoption, your attorney will seek the father's relinquishment of rights or a court ordered termination of rights. It has to be requested as part of the adoption, not separately.