The gesture happened before you could stop it
You are standing in the wedding courtyard, the light is good, someone has raised a phone, and before the count of three your aunt's hands are already at your shoulder, pulling the dupatta forward, centering it across your chest. She does not ask. She does not explain. She tucks, smooths, adjusts the fall of the fabric, and steps back satisfied, as if she has corrected something that was about to go wrong.