The Destruction of Sister

Sister is on her knees, arms bound behind her back, her body already marked by red welts. She offers herself anyway. A metal gag forces her jaw open, leaving strings of spit hanging from her lips as Brother circles her. He grabs her hair and pushes her face down into the mattress, spreading her ass wide. She knows what's coming. He works his cock into her hole without mercy, driving deeper with each thrust until her muffled cries echo through the room. Her shoulders shake but she doesn't pull away. Every inch he forces inside her is a reminder of what she asked for. He doesn't let up. He keeps going until she's trembling and used, her ass red and dripping while the gag keeps her silent.