The brother's hands, slick with oil, glide over his sister's bare skin, his touch firm yet gentle. He starts at her shoulders, working his way down her back, his fingers tracing the curve of her spine. She gasps as he reaches her lower back, his thumbs pressing into her flesh, massaging away her stress. But as he moves lower, his touch becomes more tentative, his breath hitching as he nears her ass. She spreads her legs slightly, inviting him to continue, to touch her where she needs it most. He hesitates for a moment, then gives in, his fingers brushing against her wet pussy, making her moan in pleasure.