J.K. Rowling has revealed that Lily was pregnant with her second child, when Voldemort killed her. Even worse, she had finally talked James into making peace with Snape, and even wanted to make him the child's godfather.
A mother passing by her daughter’s bedroom was astonished to see the bed was nicely made and everything was picked up. Then she saw an envelope propped up prominently on the center of the bed. It was addressed, “Mom.” With the worst premonition, she opened the envelope and read the letter with trembling hands: