She immediately took his reaction for an attempt at being subtle. Knowing Severus, he may have been waiting for her to make the first move anyway. It excited and encouraged her, so much that she did not care about what was "the correct way" for a young lady like her to act. She closed the small distance between their hands, entwining her fingers with his. Lily met his eyes curiously to see what his reaction would be. Somehow, she felt more sure of herself now than ever. Perhaps it was the butterbeer giving her courage.