Well, Michael was sort of thinking it, but now she's asking, and she's taking his shirt off, and no one is going to come in and stop them. If he says yes, this will really happen. (Somehow.) A thrill of excitement and nerves goes through him, and his pulse increases under her palm. What will they say to each other afterward? What will they do? What if it's like on New Year's and he doesn't work the right way?
He's looking back at her. He can see all the colors in her eyes.