My Brother Severus

Snape renounces Voldemort and his Death Eater wannabe friends and apologizes to Lily. The Marauders apologize and become his friends, including him amongst themselves and Snape sees Lily as his sister. When Voldemort hears of a certain prophecy, will Snape be able to prevent the family from being torn apart? Will Harry still be orphaned? Pairings: James and Lily, Sirius and Amelia