Worse Than Widowed

What could be worse than being widowed? How about erasing your husband's memories and watching as he lives out his life with the woman who has held his heart long before you were even born? A woman thought to be dead? Lily Potter joins the Wizarding World once again and comes to claim one Severus Snape. Hermione loves him enough to let him go. Will he find his way back? HG/SS AU!