If the parties are handling their own divorce, they have to (or more correctly, ordinarily, the plaintiff has to) prepare a judgment of divorce to close the case. It sounds like that hasn't been done.

The judgment should specifically recite that the children who are not born of the marriage are not the husband's children. I suggest getting a "how to do your own divorce" book if you are trying to write a judgment, as it is tricky to draft a legal and enforceable divorce judgment on your own.