The facts that he's hard and eager to move as directed don't quite fit into the scene, but it's not just about the scene here. It's also about how he can trust Nate enough to do this.

Anders shifts to position himself over Nate's cock before slowly reaching down and taking it in hand and giving it a slow stroke. "It seems my lord is very gifted. He must be very proud." And Anders is very glad to press the head of it against his hole, swallowing hard at the dull pressure he feels as he grinds down a little. After taking a breath, Anders starts to slide down and take Nate's cock in with care, closing his eyes at the sensations. There isn't a point in keeping them open this time; he shouldn't be meeting Nate's eyes and that's what he'd most want to do with them. But the mental image of his gorgeous lover is still in his mind with every fantastic inch he takes in.