In the steamy bathroom, a thick, hung brother readies for a shower. His sister, caught off guard, flees naked, leaving behind her towel. Enraged, he storms in, finding her masturbating. She screams, covering up, but his massive cock tents his towel. Drawn to her brother's size, she asks if he'll fuck her. He agrees, pushing her against the wall, his enormous dick stretching her tight pussy. Water cascades as they fuck, her moans echoing, until they're interrupted by a knock.