A Musebox

With her legs around him, the knot is right in place to rub all the harder with every stroke, and she feels like she's drowning in it, in him. Her pulse is pounding in her ears, matching the rhythm of his urgent, insistent pace. Claudia can't even hear herself crying out anymore, barely able to see through starbursts of overwhelming sensation and lack of breath. Terror fills her at the idea that she's going to pass out before he can be properly satisfied, and be punished for it.