Memories of the event are still enough to freeze Sina in place, rendering her immobile and stuck in her own mind as she relives the terror of it, but she is fortunate to be in a position where that isn't being asked of her. She won't or can't talk about it, because it still makes her sick to do so.
She squeezes Araceli's hand back and buries her face in Korrin's shoulder, no longer crying but clearly not interested in opening up any further. Lux goes unattended for now, as she can't bring herself to project even an ounce of this awfulness onto an innocent being.