In the dim light of their shared bedroom, a brother and sister give in to their forbidden desires. The girl, her body trembling with anticipation, watches as her brother strokes his thick, veined cock. She can't help but touch herself, her fingers dancing around her clit as she imagines the taste of his salty pre-cum. He growls, his eyes locked on her glistening pussy, and she knows he's close. She wants to feel his hot load on her skin, marking her as his. He explodes, his cum painting her tits, and she moans, her own orgasm ripping through her.