Hahahaha! I swear we're like mirror images of one another. I always read the end first as well. But, for me, I'm looking to make sure Snape tops. Though I won't automatically not read something if he doesn't.
In the scheme of things I think it was probably best she didn't finish. Because it certainly seemed like she wanted it to end SS/HP and that would just be so unfair to Remus. And my guess was that her compromise would be my bulletproof squick to end all squicks - a threesome. *shudders*
And I'll make note of that rec for the next time I update.