Severus and Petunia's Nephew

One year after Voldemort killed Lily and James Potter, Severus Snape pays a visit to Number 4 Privet Drive. He has a duty to Lily Evans, the best friend he ever had, and therefore to her son and her sister. He finds himself assuming the role of the child's uncle. As it happens, the friendship between Severus Snape and Petunia Dursley changes both of them, both of their lives, Hogwarts, and their world's future for the better. (It's so much easier to be a good person when you're not clinically depressed, afraid for your family, or stuck in your past trauma).This is a lengthy story meandering through Harry's childhood, with eventual plans to see it through his Hogwarts years and a very different resolution to canon. But in the meantime, the goal is cuteness and exploring a world with better-adjusted adults in it.