Sweet, innocent stepsister Barbienina, barely 18, finds herself alone with her older brother Ken. He's been eyeing her curves, and she's been noticing his growing bulge. One day, she catches him masturbating in the bathroom, his massive cock throbbing in his hand. Intrigued and aroused, she offers to help him 'relieve' his tension. On her knees, she takes his thick, pulsing dick into her mouth, tentatively at first, then hungrily. She gags, but her hunger for more is insatiable. Her inexperience is evident, but her enthusiasm is infectious. Ken can't hold back, and soon, he's fucking her pretty face, his cock slamming against the back of her throat.