Oh, very nice. There isn't one particular part that struck me -- the entire fic was a good sketch of Snape's muggle life with Dora. I think he was so different in the muggle word because he could be *himself*, and not who people expected him to be.
Love how Dora's concerned about the kids going to Hogwarts, especially her point that "...oh, they call him a hero now, now he's gone and can't hear them, but all the while he was there--no."
Also like the part about the surprise!baby. Here's another vote for placing a frame in his muggle house so he can continue to interact with the family.