I liked it, especially that it didn't work out 'perfectly' as that would have been very unrealistic. I thought you wrote the characters well too, and wasn't surprised that Draco was the first to be unhappy with this arrangement. It was also a nice way of explaining Draco's marriage to Astoria, not Pansy.
Author's Response: Poor Draco - he has so much on his mind already, and then he has Pansy bothering him with some kind of open relationship nonsense. It's no real surprise he didn't end up with her, in the end.
I had a fun time finding the voice of the characters - silent Blaise, moody Draco, and Pansy who is a bad person but is incapable of thinking of herself as such. The justifications and internal reasonings made by people who aren't the heroes are more interesting to write, I find.
Thanks for reviewing! Glad you enjoyed the story.