Hidden away from prying eyes, the stepsiblings engage in a forbidden dance, their bodies inches apart, breaths mingling. She traces the outline of his hardening cock through his jeans, feeling its length, its thickness. He groans, his hips jerking forward. "You like that, don't you?" she whispers, her voice husky with desire. He nods, his eyes locked onto her heaving chest. She pops the button on his jeans, slowly pulling down the zipper, revealing the head of his cock, glistening with pre-cum. She licks her lips, eager to taste the forbidden fruit.