A thick cock bulge in sweatpants piques a sister's interest, drawing her gaze like a moth to a flame. Her pussy dampens as she watches her brother's hidden length grow, tenting his pants. Seizing the opportunity, she strokes him through the fabric, feeling his heat and hardness. Caught off guard, he hesitates before succumbing to her touch, his cock pulsing in her hand. She guides him to the couch, hungry to unwrap his massive tool and taste his forbidden fruit.