"Fuck," Kavinsky breathed, a thread of laughter working out of his chest as he started to move his hips in time with Jack rocking back on him. He let Jack lower his head, gripping his shoulder tightly. He wanted, badly, to push the limits.

He put a hand on the back of Jack's neck, squeezed there, his fingers close to the pulse in his neck.

"How much you gonna let me do, boy?"