Relating to suits affecting the parent-child relationship between a parent and a nonparent.

HB 4656 creates a strong legal presumption that parents act in their child's best interest and that children benefit from parental care in custody disputes between parents and nonparents (like grandparents or caregivers). It requires nonparents seeking custody or visitation to prove by "clear and convincing evidence" that denying their request would significantly harm the child's physical health or emotional development. This bill directly affects parents and nonparents involved in custody cases under Texas law, shifting the burden of proof to nonparents. The changes apply to cases pending or filed after September 1, 2025, and do not alter the court's requirement to prioritize the child's best interest.