Severus felt his jaw drop. He hadn't been expecting that... but given Lily who was dead was here, he supposed it could be possible. This actually further reinforced the idea that it was actually Lily and not an imposter who he had been talking to.
"Five years," he said slowly. "That isn't that big an age difference, just surprising," he told her looking at her carefully. He could tell she was slightly younger but it hadn't occured to him that she actually was younger than what he remembered.