Death, Time and Fate were watching the final moments of the final battle. The three deities were saddened by outcome of the battle. "This isn't how it was supposed to happen. Harry was supposed to kill the cheating worthless useless bastered and finally bring peace to the wizarding world" said death. Time and Fate was listening to the ranting of their fellow sister, but they to be pissed at how everything went down.
The three primordial deities decide to reverse time and fix certain aspects.
"Lily Take Harry and run, I'll try to hold him off" James screamed to his wife. Lily didn't have time think about the command. She rushed upstairs to the nursery and knelt before the crib "Harry never forgets that both dada and mama love you. You were the whole world to us" she said while tears were flowing down her face.
The nursery door was blasted off its hinges and their stood before them was a man that wasn't human. He leveled his wand and yelled "Move aside Mubblood. In exchange for your son, I'll spare your filthy life".
Lily turned and looked with tears in her eyes said "Please take me and kill me, but please spare my son". "Very well mudblood" he sneered. Voldemort raised his wand and yelled "Avada Kedavra" and green energy shot fourth from the wand and slamming into Lily's chest.
Sirius Black was speeding towards Godric's Hollow. He had a feeling something terrible has happen. When he reached the house, he saw it was destroyed. The wizard ran throw the busted front door and immediately found the body his brother in everything, but blood. "I'm sorry James, it is my entire fault" he said in a broken tone. Tears were running down his face, but he knew he must get his godson out of here just in case other death eaters join them.
He made his upstairs and found the nursery door blown off its hinges. Sirius saw Lily lying before his godson's crib. Thankfully his godson was alright, but was crying his little heart out. "Harry, at least you survive" he said in a flat emotionless tone. When he went to pick up his godson, he heard a muffled sound. The wizard looked around and saw his friend lily twitching.