In a cramped bathroom, a stepsister spots her brother's predicament - a massive, throbbing boner tenting his pajamas. With a mischievous grin, she offers to help. She strips, revealing her luscious body, and starts rubbing his cock through his pants. He's hesitant, but his desire wins out. She gives him a sloppy handjob, then kneels, taking his length deep into her throat. She finishes him off with a sensual anal massage, her tight ass milking his cock until he cums hard.