In the dim light of their shared room, the siblings' curiosity gets the better of them. The sister, intrigued by her brother's newfound manhood, uses her feet to explore his cock, running her soles up and down his shaft. He gasps at the unexpected touch, his dick throbbing with excitement. She grins wickedly, enjoying the power she holds over him, as she continues her footjob, pushing him closer to the edge with each sensuous stroke.