I started reading this and got so wrapped up in Petunia's PoV that Snape's appearance took me entirely by surprise; I had forgotten I was reading a Petunia/Snape fic. I've always liked the potential of this pairing, they've got so much in common - especially when it came to light that they've known each other for most of their lives. Their day - Lily's day - is so bittersweet. I'm glad they had the chance to have it.