This question has been addressed in 1 Texas court opinion:
COA12 — February 11, 2026
This case involved a custody dispute between a biological father and nonparent intervenors (the maternal aunt and uncle) who had been caring for twin infants. The primary issues were whether the nonparents had legal standing to seek custody and whether the trial court erred in awarding them conservatorship over the fit biological father. The Twelfth Court of Appeals determined that while the nonparents' initial petition was properly struck, their second petition established standing because they had exercised exclusive 'actual care, control, and possession' for at least six months following the mother's departure from the home. However, the court reversed the conservatorship award, holding that under the Texas 'parental presumption,' a nonparent must prove that a parent's appointment would significantly impair the child's physical health or emotional development. The court found that evidence of the father's past drug use and the intervenors' concerns about his 'lifestyle' were insufficient to meet this high evidentiary bar.
Litigation Takeaway
“Standing is a jurisdictional threshold that can be cured by the passage of time; a nonparent who fails the six-month residency requirement today may acquire standing through a subsequent filing once the timeframe is met. However, establishing standing does not guarantee custody, as nonparents must overcome the powerful 'parental presumption' with specific evidence of significant impairment to the child, rather than mere 'best interest' comparisons or vague lifestyle grievances.”