In the heat of the moment, she finds him stroking his rigid cock, a bead of pre-cum glistening at the tip. His sister can't resist the allure of his rock-hard dick, eager to taste the promised 'lechita' from his intense stroking. She drops to her knees, hungrily taking him in, her lips milking his shaft as he fucks her face, both lost in the taboo pleasure of their newfound game.