Rising from the Ashes

Severus Snape heard the prophecy, he told Voldemort, Dumbledore, and then he took matters into his own hands. He told the Potters himself. Because of that, Lily lived. With Lily alive, what changed? What if Harry had a little sister, how would that change things? Snape and Lily are in this story, along with Sirius and Remus and several OC's.