Perils of DIY Texas child custody & visitation-- I had an inquiry from a poor sole who asked if once his rights were terminated, could he get them back--he was unprepared at trial. Child custody and visitation is not a Do It Yourself task. Once a judgment of termination of parental rights becomes final, generally 30 days after it's signed, that judgment is nearly impossible to undo. Termination of parental rights is permanent and can't be undone. Without adopting your own children, there is no way to recreate those parental rights. If you don't understand the lawsuit papers when you receive them, take them to a lawyer. Even if you do understand the lawsuit papers, take them to a lawyer if you care at all about your children. There are family law attorneys who can help you with this. Don't take the passive-agressive route. You can get easily burned.
If you lose primary conservatorship, you still have rights and duties towards your children. Those rights and duties, including possession and access may be modified by either parent based on a material change of circumstances, so long as the requested change is in the best interest of the children. if you lose on conservatorship, you are still in the game if you have changed circumstances on which to base a subsequent petition to modify.