The rocking of Stiles' hips was all too encouraging and was the last thing Derek needed to move. With his arm tight around Stiles' waist, he shifted the two of them and pressed him back against the nearest vehicle to rock in against him.

If he'd been thinking beyond just what it felt like to be against Stiles and how he wanted more, Derek might've realized they were pushing it a little too far. But he wasn't. Not with the way his lips were occupied as he pressed against Stiles.