I'm with everyone else - you had me at the title. Harry was a sweet little boy and it was good to see that even Snape couldn't remain unaffected by his charm for long.
Hermione's affectionate regard for her boys was a nice touch and you really managed to capture her innate personality here. I liked the evolution of the story and the development of the Harry/Snape relationship. I was so involved in what was going on in the story I almost didn't need Harry's omg!hot!seduction of Severus. Almost. ;D This was really just a lovely, fun story. Great job!