The siblings, both craving forbidden fruit, find themselves in a compromising position. She's been dreaming of his big, hard cock, and he can't get the image of her tight, little asshole out of his head. They're alone, the house silent except for their heavy breathing. She turns to face him, her eyes filled with lust. "I want you to fuck me," she whispers, her voice laced with desire. He doesn't need to be told twice, pushing her against the wall and lifting her leg. He spits on her asshole, rubbing it in with his thumb before pressing his cockhead against it. She gasps, feeling the intense pressure, but she wants more. She pushes back, taking him in inch by inch, her body stretching to accommodate his size. He starts to move, slowly at first, then faster, fucking her raw and deep. She moans loudly, loving every second of their taboo fuck.