In the realm of BDSM, a dominant femdom takes the reins, her eyes gleaming with authority. She presents her slave with a chastity device, the only key hanging from a delicate chain around her neck. The slave, eager to please, submits to his mistress's command, allowing her to secure the device around his eager cock. The femdom, a master of control, teases her slave with a tantalizing handjob, feeling his throbbing member strain against the constraints of its new prison. She expertly brings him to the brink of orgasm, only to deny him release, her voice a symphony of power and control as she commands, "Not yet, my pet. You will only cum when I say so."