I left out on the divorce papers that I had another child with someone else while spouse and I split, What can I do to change the petition form even though my spouse has already been serve.

File an amendment with the court.

Was this before you filed court papers? If so your husband may be responsible for that child regardless of who the bio father is. You can amend but it may not make a legal difference if it occurred before your initial filing.

Was this before you filed court papers? If so your husband may be responsible for that child regaurdless of who the bio father is. You can ammend but it may not make a legal difference if it occured before your initial filing.

This is true, but the husband could perhaps contest paternity.

This is true, but the husband could perhaps contest paternity.

The husband contesting it would not be part of the OP's filing. From a legal stand point it may or may not make a difference when amended as to who the legal father is.

The husband contesting it would not be part of the OP's filing. From a legal stand point it may or may not make a difference when amended as to who the legal father is.

If OP amends her complaint, or if husband contests in his answer, it's 6 of one and 12/2 of the other. The only real difference is that, in the former scenario, the court will know from the get-go that there is another child, who is arguably not a child of this marriage, and that the existence of this child is an uncontested issue.