In the dimly lit dungeon, Mistress Bertha, a seasoned dominatrix, prepares her submissive for an intense session of electro-play. Her experienced hands caress his body, tracing paths that will soon be marked by the electric current. She attaches the electrodes, her voice a sultry whisper, commanding his complete surrender. The room fills with the hum of the machine, the crackle of electricity, and their shared anticipation. As she increases the intensity, his body responds in waves of pleasure and pain, yielding to her every command.