This story picks up their relationship in such a way that the fic could be a sequel to any and all happy ending Snarry fics I've read before. Awesome!
I like how their love for each other shows throughout the whole fic. Even though it's in Sev's POV, I can see Harry's love as well. I adore how dedicated Severus is to Harry. This fic gives me the impression that either one, especially Severus, would die of grief if one of them died prematurely.
I loved the interaction between Severus and Petunia. I like the motivations you gave her for her actions. I get the impression that she feels she has trapped herself in a sad, bitter life in Privet Drive. I kinda felt sorry for her. Does she have the courage to make some changes or will she continue on, as if to punish herself? And Harry knows that Petunia helped but figured out that she didn't want recognition for it and is granting that wish, just as he doesn't blame Severus for lying about how he recovered.