This went a totally different place than I imagined from reading the pairings! : ) And I really loved it. After the entire plot by Dumbledore was revealed I was so disgusted with him--his hubris, certainty that his way was the only way--and that so much of his plans caused pain or death for others.
I loved how you showed such a strong and clever Severus beating that nasty old man and the Dursleys. I agree with Starduchess though, I'm left dying to know what his punishment on the Dursleys was and were they went. I imagine that there was some spell or something that showed their true selves or true intentions rather than the false fronts they so enjoyed but really curious.