The last time Lily and James Potter looked into each other's eyes was on October 31, 1981.
They hadn't had time to think, let alone grab their wands, when Voldemort attacked, and upon instinct James told his wife to take their son and run. She gathered Harry in her arms and headed up the stairs, turning around for one final glance at her husband. But instead of seeing his back headed towards the door, she was caught in his eyes, and he in hers. That final moment they shared together wasn't filled with fear or panic: instead, it was filled with courage and love, a love that neither one of them was ever fully able to understand.
After what seemed to be an eternity, he broke their gaze; and as she stood on the stairs and watched him turn towards the front door, she knew, right there and then, that if she could have done it again, she wouldn't have had it any other way.