I read this when it first posted but somehow forgot to comment-I apologize for that.
First of all, thank you for writing what you wanted to write-shamelessly, passionately. I think from Snape's side-it was nice to see him able to live the life he could have had even if it was in a portrait half-life. This fic was painful at times, brutally honest-the characters very IC. And as much as it's sad to hear you won't write any more Snarry (understandably) and you've written a classic take on the Epilogue and beyond. An enthralling, compelling read.