There is a strong presumption that a child’s best interest is served when a natural parent is awarded custody in Texas. This presumption puts a heavy burden on someone who is not a parent who wants conservatorship of a child. The non-parent will have to prove to the court that appointing a parent as managing conservator would harm the child’s physical or emotional wellbeing.
Under Texas Family Code §102.003, there are 14 different categories to which someone may belong in order to bring a SAPCR (Suit Affecting the Parent-Child Relationship). A child or parent has the right to file a case. Moreover, so do certain other people who care for a child for a minimum of six months, as long as the six-month period ends less than 90 days before the date they file a petition.
In Re HF is a recent Texas appellate proceeding involving a grandmother’s plea in intervention in a lawsuit that affected the parent-child relationship. The case arose when the Attorney General brought a SAPCR proceeding to establish conservatorship over a mother and father’s child. The judge signed an agreed order, and the father appealed it. On the same day, the child’s grandmother petitioned to intervene in the SAPCR proceeding.
Texas Divorce Attorney Blog

