Quite dark in its premise, that Sakura finally obtained what she thought she wanted only to find that was never what she wanted at all. A turmultuous future, in which they have only a few stolen moments together, but at least then they can be happy.
Think narusaku fans/readers will review WTF? I know this was top of your head and all.
She was married to another man? Then sleeps with Naruto after the fact? Are you sure you are not implying 'Naruto's second best'? I mean from the POV of a narusaku fans?
The story would had been fine if the fact you mention she was married to the teme. Nor the fact she chose him 'first' which by all means make Naruto 'second'. Kinda hard to read stuff like these and not come out ranting or raving something good.
Guess that fact this oneshot on fly doesn't quite inspire narusaku nor feel anti-sasusaku. More like the other way around even though you wrote it anti-sasusaku pairing with narusaku. From POV of narusaku fan/readers does seem like it.
Later.
PS. I know you did this on the fly basically. I do hope you reread this one again. If she lived the momen and love with Naruto, she wouldn't be married to the teme in the first wouldn't she? WOuldn't better if she left him at the alter. (I think the other problem narusaku fans/readers see in this oneshot, she more than likely slept with the teme before Naruto which makes the story a whole lot less like narusaku doesn't it?) *sighs*