“Advanced tool for internal vibration tolerance testing,” he explained, coating it generously in lube. The metal was cold when he pressed the rounded tip to my entrance. He slid it in slowly—inch by torturous inch—letting me feel every smooth ridge, the gradual stretch as it opened me. Once seated, he began to crank the screw. Wider… wider… until my inner walls were pulled apart, exposed, gaping under the light. I could feel the cool air rushing inside me, teasing places that had never been touched like this. My clit throbbed visibly, begging.

He pressed the button.

The vibration started low—a deep, pulsing hum that radiated through my entire pelvis. I...