Her lips part slightly as she feels the heat of his cock against them, and with a gentle tug, she pulls him closer, taking him into her mouth. She moans softly around him, feeling the familiar shape and texture of his member as she begins to suck gently, moving her head up and down in rhythm with each stroke. Her free hand finds its way to his hip, guiding him deeper inside her mouth as she takes more of him.
Her brother groans loudly, thrusting into her mouth as pleasure washes over him.