It was great, and I wouldn't even have known that there was a switch, until:
"Her eyes widened, her fingers clenched the black silk sheet, and her mouth dropped open. “Oh,” she grunted, “wow.” Her breath was coming out in hiccupping pants, her toes mimicking her hands and curling into the sheet."
Black silk sheets after studying? That seems so, dare I say, Draco?
I read this version of the story once before though without reading the note that explained the word change and didn't notice it. I think it just jumped out at me the second time.
I liked that the story started once the line had been crossed, having already ended up here, it was a nice change from the getting there stories.
That said, I'd love to see you do another H/H where the story starts without having touched other yet, but having crossed a different sort of line, not spoken or anything but in their minds. Just a thought.
Anyway, me likes.