There were more photos of Heidi and Ed in the photo album. Kay found all of them and, in each photo, the two kids were always smiling. There's no doubt that they had no idea what love was at the age of six but it seems like these two were definitely meant to be together.
Kay also discovered some photos that she never remembered. One of those was the photo of the kids wearing bathing suits with huge smiles on their faces. That's when Kay realized that absolutely no one knows about this. She was so excited to tell the two of them but she knew that she had to tell someone else first!