James And Lily got married young and it was right before the war against Voldemort. The order won the war and now Lily and James could focus on their life. They wanted a child but Lily wouldn't conceive no matter how hard and much they tried. They went through a process and their person called them one day. It was a lady, named Elizabeth.

"We have a little girl. She's young which could possibly make it better" Elizabeth informed them and tells them more. They agree

A few days later they go to the workplace and Elizabeth tells them yoir name, age, etc. She leads them to the room where you were at