She kneels on all fours, presenting her ass to the machine. It enters her with a rough thrust, making her gasp with pleasure. It sets a fast pace, its mechanism slamming into hers with each thrust. She moans with pleasure, her body writhing with ecstasy. She imagines her lover joining in, taking control of the machine. They push her to the brink of ecstasy, trying new positions and techniques. Her eyes roll back in pleasure as she finally reaches her climax, her body shaking with pleasure.