"You little bitch, you want this, don't you?" the stepbrother growls, slapping his sister's ass hard. She whimpers, but her body betrays her, her asshole clenching in anticipation. He spits on her asshole, then forces his way in, making her gasp. He fucks her hard and rough, his balls slapping against her clit, her juices dripping down her thighs. She claws at the couch, her moans turning into screams of pleasure as he hits her G-spot again and again, their taboo passion consuming them both.