In the dimly lit living room, the siblings sit close, the TV's soft hum the only sound breaking the silence. Her leg brushes against his, and they both feel the jolt. He looks at her, really looks, taking in her heaving chest, her parted lips. She's been watching him, too, admiring his strong arms, the way his jeans hug his hips. Their eyes meet, and the unspoken words hang heavy between them. He leans in, pressing his lips to hers, and she melts, her body molding to his. As they undress each other, their hands shake with anticipation. When he enters her, they both gasp, their bodies fitting together perfectly, their pleasure echoing through the empty house.