The feeling of his teeth on her skin made her gasp sharply, groaning out, her thrusting back up harder against him, deliberately clenching herself around him for a brief second, hands sliding to smooth over the muscles of his back. She moaned into his ear, nails digging into the skin of his back slightly. "Mark. . oh shit. .so . .good. ." She tilted her head to suck at a spot on his shoulder, avoiding his neck so he wouldn't have to worry about hiding the mark she was making with her mouth, which soon broke off his skin in a cry of encouragement. "God yeah. . there. .there. .Mark. . oh fuckin' . .close, so close. ."