In the State of Missouri a father does not have any legal custody rights to his children until it is established through a court order. A DNA test, a paternity affidavit, nor a child support order can change that. In Missouri in a paternity a Mother is assumed to have sole legal and physical custody of the child with all visitation time. That means the Mother can move anywhere at any time and does not have to noify Father. It sounds like you need to establish that he is legally Father, set up some custody time and settle all financial issues between the two of you. All of that can be done through a paternity action. I would advise you to seek the advise of an attorney to get started.