Innocent teen stepdaughter, her eyes wide with curiosity, finds herself alone with her dad, his gaze lingering on her developing body. He approaches, his voice low and soothing, "You're growing up, aren't you?" She nods, her heart pounding as he traces her arm, his touch sending shivers down her spine. He guides her hand to his crotch, his hardness evident. She gasps, but doesn't pull away. "I've seen you looking at me," he murmurs, unbuttoning her shirt. She blushes, but her nipples harden as he exposes them. He takes one into his mouth, and she can't help but moan. His hands roam her body, finding her wetness, making her squirm with new, intense sensations. He undresses her fully, then himself, revealing his thick, throbbing cock. She tentatively touches it, her inexperience evident. He smiles, guiding her hand, teaching her to stroke him. He pushes her onto the bed, spreading her legs, his mouth finding her clit, making her cry out. He enters her slowly, filling her, making her moan with a mix of pain and pleasure. He fucks her gently at first, then harder as she meets his thrusts, her virginity long gone, replaced by a hunger for more.