Her stomach did a flip as she understood what they were, and recognized what everything else was at the same instant.
"Pet, you know what I do for a living. I know the properties of electricity inside and out, and I'm well acquainted with what it can do to the human body. Do you trust me to send current through your body without causing harm?"
She thought about her answer a minute—electricity terrified her. Garnet had used a TENS unit on her, but never actual voltage. However, as Zach said, electricity was his specialty.
"Yes, Sir. I do."
"I'll be using TENS on your breasts; you're familiar with that already. You'll experience real electricity below the waist, and it'll be a new sensation for you.” He held a small bit gag in front of her face. “Open, please. You'll still be able to safeword, but I need your mouth kept open for this."
Dana accepted the bit, her body recognizing the feel as the sides of her mouth were pulled back. He fastened it, double-checked the tightness, and kissed her just above her left eyebrow. She bit down experimentally, thankful it was soft between her teeth—she hated metal bits.
"What do you say if you want the electricity to stop, and stay off?"
She spoke around the bit, making it sound reasonably close, and received a curt nod. “Very good. I'll start slow and build up, but I'm warning you now the final twenty seconds will be more than you think you can handle."
He placed a TENS unit and a box with multiple dials, buttons, and gauges on the table. “Four minutes, pet. I know you can do this for me. Last the four minutes and I'll fuck you every which way I can, and I'll allow unlimited orgasms. If you safeword you'll spend an hour in pain instead of bliss.” He leaned down, his voice dropping an octave, excitement showing in his eyes. “I want to see your body jerk and spasm out of control. I need to hear your screams. This isn't punishment. You've done nothing to deserve discipline."
Her brain switched into slow motion as he started the timer and began pushing buttons and rotating dials. The muscles of her ass contracted and relaxed around the plug, teetering on the edge between uncomfortable and painful. Her awareness jumped to the tingles shooting from one side of each breast to the other, straight through the nipple.
The thing in her pussy came alive, and not as gently as the plug in her ass—the contractions more intense. Her outer lips were next, and those in addition to the jolts inside were too much. She gave a short scream and tried to pull her legs together, struggled to move her hips up, but no movement was possible, he'd restrained her too well.
He gradually ramped everything up, and when she was sure she couldn't handle much more she looked at the timer to see she was at a minute and fifty seconds—not even halfway.
She attempted to speak around her gag, meaning to say, “Too much, Sir! I can't take it!” What came out didn't sound like what she'd intended, but he apparently understood.
"We're about half the intensity I plan to give you, pet. I'll tell you what; we'll back off on the plug's timing, make it every twelve seconds instead of every six. I haven't sent juice to your clit yet, I'm saving the best for last. You know how to make it stop if you need to, but if I don't hear the magic word I'll continue with my plans."
Another jolt and spasm hit her pussy, followed by the clamps on her lips, and her lower body jerked as her lungs and voicebox belted out a bloodcurdling scream.
At the sixty second mark he told her she was in the final stretch, just before he turned everything up. Her body screamed at her to make it stop, the electricity shooting through her muscles like ten thousand electrified ants swarming through her. At forty seconds, he marked the time and told her she could do it. An eternity later she heard “Twenty seconds,” and then her body felt like it was coming apart.
Whatever was attached to her clit finally came to life, the sensations streaking into and around her genitals in ways she hadn't thought possible. The cramps and fire in her ass and pussy were agonizing, and she had no control over the way her body tried to jerk and spasm in its bonds. Her tits felt as if a million tiny hot pokers were shoving at them, and she only broke off from screaming long enough to quickly pull more air in.
Suddenly, it all stopped. Nothing. Silence. Peace. There was only the sound of her ragged breathing, and just as it began smoothing out, the thing in her pussy pulsed once. And again. Her clit pulsed. Not painful. She heard Zach say one word, as if he were in a room with an echo.
"Come."
Her body obeyed him, spasming hard; the same muscles the electricity forced into paroxysms were now contracting and relaxing in waves of pleasure and bliss while Zach freed straps and cuffs.