OK, since Dragon's muse has done the picky parts, I will just flow with my thoughts.

First, I seem to remeber a post about a perfect seduction requiring metaphores. I must have missed them here. lol

I really love the way that you brought about the seduction is such a subtle manner. The only reference to sex in the story was her thoughts about the movie, and those only if you know the movie. (I hope I am thinking of the same movie.) I really like the way he put two and two together and the way he looked at her after she replied to the question.

And then:
"So, do you want to be my partner for the role-play?" Mark asked.

It felt as if my heart physically leapt up my throat as the reply gushed from my mouth, "Yes!"
Perfect ending!

The only real critique I would have is writng in The End like you did. I do not think it was neccessary, just leave the reader wanting more, and wondering if it was coming.