Draco re-read the owl several times, and then asked Astoria to read it just to make sure he wasn't seeing things. He proceeded to check it for authenticity for over an hour. Finally, he scrawled a reply:
Godfather,
I know we haven't been close since your fortunate return to life, but a Potter? Merlin's beard, couldn't you have chosen someone of a higher social stature? Or at least not a Potter?
Still, Astoria and I send our congratulations. And of course we'll be there.
I suppose I should be thankful you chose the least Potter-ish of the lot.
Congratulations, Draco
P.S. Good luck dealing with your father-in-law.
Draco would've loved to see the look on Harry's face when he heard the news.