The sister, driven by her lust, takes the initiative, her fingers dancing over her brother's cock, coaxing it to life. She feels it pulse and grow, her own pussy aching with need. She spreads her legs, inviting him in, her voice a husky whisper, "Fuck me, brother. I need you inside me." He resists at first, but her touch is too persuasive, and soon he's thrusting into her, their bodies moving in sync, their moans filling the room.