It's hearing his name that does it for him; that, and how she tightens up when she comes, grips him and moans, and he'd love to hold on a bit longer but fuck it, it feels too good. His head drops back and he lets out one more deep groan as she pushes back, just as he pushes forward, and everything is suddenly a searing line of pure pleasure that cuts him through the middle. He chokes on a small cry and his fingers dig into her skin, rocking hard as everything lets go.