With a nervous laugh, I introduce my girlfriend to our cuckold arrangement. She's hesitant but curious, her eyes widening as she takes in the sight of my friend, already naked and eager. I guide her to the bed, her hands trembling as she undresses, revealing her smooth skin and toned body. As they begin, I watch, my heart pounding, as my friend's hands grip her hips, pulling her onto him in a slow, steady rhythm. Her back arches, her moans filling the room as they find their pace, her body yielding to his in a dance as old as time.