Absolutely fucking AMAZING. This is story-telling in perfection. I'm in awe at your talent.
From Petunia's slippers to baby Tom's scabby head, your detailed and powerful descriptions are amazing. The surrender of the greasy unicorn is an image that'll stay with me forever. Stunningly beautiful!
To tell the story from Lily's afterlife POV - what an amazing idea. Her slow change, her final acceptance and her regret - I'd never have thought that I could like Lily Evans, but you made me. The scene when she listens to Snape's heart and doesn't see his happiness, this is so vivid, so real, so much more understandable than her canon pettiness.
It's fantastic how you discuss canon on a meta level here, never forgetting your focus on telling a story, though. With Harry's cold, stenciled life with Ginny you show exactly why the schematic happy ending with kids etc. is so horrible. I had to laugh out loud when Lily mistakes Harry and Ginny for James and herself.
The voyeurism, your sex scenes in general - so HOT, so full of passion. And the tenderness. Observations like that Harry likes to hold Snape's limp cock touched me, as did the scene when Snape holds his own hand. I loved how Snape saved Harry, with so much passion and despair.
I stop my incoherent babbling here. I have so much love for your story.