It appears from your question that there is currently no pending court orders. You need to file a Suit Affecting Parent-Child Relationship, be recognized as the legal father of the child, and ask for Temporary Orders. At the least this will prevent her taking your son out of the jurisdiction of the Austin court. This is a difficult process to accomplish on your own. You really need to get an attorney. There are very good attorneys on this site that practice in Travis County. At the very least contact Fathers for Equal Rights for either some startup help - or referrals for low-cost representation if necessary. Good luck.
The above answer does not create an attorney/client relationship. These responses are merely intended to provide general information about the question asked. Frequently, the question does not include important facts that, if known, could significantly change the answer. Information provided on this site should not be used as a substitute for competent legal advice from a licensed attorney in your community. The law changes frequently and varies from state to state. You should verify and confirm any information provided with an attorney licensed in your state
I agree with Ms. Langford. Assuming there are no current orders concerning your child, you need to get a court order establishing you as the father and Temporary Orders restricting the residence of the child to Travis County and setting up a possession schedule pending a final order. You should do this before she moves as it will become more expensive and complicated if she goes to another state.
This is not specific legal advice and does not establish an attorney/client relationship.
Sign up to receive a 3-part series of useful information and advice about child custody law.