In the dimly lit basement, Robby Echo grunts, lifting heavy weights, his body glistening with sweat. Bored and horny, stepsisters Madi and Aria can't resist the allure of his muscled form and growing bulge. Aria, the braver of the two, crawls towards him, begging for his cock. Madi, hesitated but equally aroused, watches as Aria sucks Robby's dick, then takes it deep inside her, moaning as he fucks her hard. Robby, empowered by their desire, uses them both, his thick cock stretching their tight holes, leaving them filled with his cum and a newfound hunger for his free-use.