Custody Dispute: Child's Welfare Trumps Father's Rights Over Grandmother's Care

The court upheld the lower court's refusal to return custody of a child to the father, based on Article 310(3) of the Civil Code, because the child had lived with the grandmother for a significant period (over two years, covering crucial developmental stages like kindergarten and first grade) and a change of custody to the father would endanger the child's development due to the risk of uprooting her from her established social network and closest attachment figure, the grandmother, despite prior expert opinions suggesting the father as a second-best option when the grandmother's relationship with the mother was deemed too fraught. The court emphasized that the child's interest in a continuous, stable relationship outweighs the father's right to custody, especially since the child had become well-adjusted and formed new contacts at the grandmother's residence, and the grandmother was now better able to maintain boundaries with the child's mother.