A simple Divorce is when the parties to a marriage do not have any children under the age of 18, do not own any property together and do not have retirement or pensions accounts that need to be addressed in the Divorce.

If you were married to the father, by filing for Divorce.  If you were not married, then you would file a Suit Affecting Parent Child Relationship to establish paternity, require child support and medical support and establish custody and visitation for the children.

A Divorce Decree is modified by filing with the court a Petition for Modification.  You can seek to modify child support and medical support payments (up or down), custody, visitation and remove geographical restrictions.

If the party required to pay Child Support is not making the required payments, you can file a Petition for Enforcement with the court.  In some cases the court can find the person in contempt and have them jailed for failing to make Child Support payments.

A Petition for Enforcement should be filed to seek court enforcement of its order.