As Lily moves, Severus becomes wary. Like he's about to be attacked, or that the other shoes is going to drop. Watching Lily with himself to exposed and vulnerable, waiting for... something, anything. His life leading him to expect the worst, never daring to dream that anything different could happen.

Then her lips are there, soft and warm against his own. A brief touch, as chaste as her image to him was pure. His hands fell uselessly into his lap, eyes closing as she pulled away. The first tear falling as she spoke those words. He knew the kiss was that of a dear friend, and it hurt all the more. A knife twisting sharply in his chest to hear words similar to his own, yet wholly different.

"Yes... it was. What will you have of me, Lily?" As he spoke his eyes opened, bright with the gathered tears. He looked at her, struggling to hold himself in check. "Say it, and it will be yours. I-I cannot lose you again." the 'you are all I have left' was left unsaid.