In a secluded riverbank alcove, Humping Jack finds solace in the cool stone under the sun's warm gaze. Uninhibited, he grinds his hips against the solid surface, his hard cock sliding wetly. The river's gentle burble accompanies his rhythmic humping as he strokes his length, pre-cum mingling with river water. Jack's breath hitches as he nears climax, his body tensing. With a final thrust, he spills his load onto the stone, the cum glistening in the sunlight before the river claims it.