Fiona Rivers, bound and on her knees, awaits her master's pleasure. He teases her asshole with his fingers, making her gasp. A machine hums to life, its massive dildo glistening with lube. Fiona's eyes widen as it inches closer. Her master grabs her hair, pulling her back as the machine's relentless thrusts begin. Fiona screams, her asshole stretched to its limit. She's ordered to swallow her master's cum, choking slightly as he comes down her throat. The machine never stops, fucking her ass raw until she collapses, spent and used.