If they weren't at the party, he'd be a hell of a lot more talkative, but then, if they weren't at the party, this might not be nearly so exciting. Sure, he's never going to turn down the chance to fuck her up against a wall like this, but the enjoyment he gets from it is just amplified by the fact that someone could come around the corner at any minute and see what they're doing. He wonders how he'd respond if they did, and the idea of it makes him quicken his pace just a little, spurred along by the thought of someone watching them.

Her head is against his shoulder, so his own head drops to bury his face in her hair, because that's a lot more effective of a way to silence himself than willpower alone. And even still, he's swearing like crazy, it's now just being mumbled against her hair.