This is getting electric.

Gemma's fingers clutch the edge of the desk as the first shock pulses through her body. Her back arches, her nails digging into the wood beneath her fingers. He presses again, this time holding the button for a second longer. A choked cry escapes from her lips as the current surges inside her ass, her limbs seizing up in an excruciating full-body cramp. She collapses on the desk once he releases her, and she appears dazed and disoriented from the sheer shock of the current.

Blackwood leaves the rod inside her, unbuckling his belt. He kicks her stiffened legs wider and grabs her hips, pulling her back onto his cock in one rough thrust. She gasps, her pussy stretching around him, the shock of his entry as intense as the wand. He grabs her hair in a bunch and pulls her head back, and then reaches down and grabs the handle of the wand. He presses the button again, but this time he doesn't let go. Gemma's body locks up as the rapid electrical pulses surge through her body, completely overriding her nervous system.

She tries to cry out but can't; in fact, she's barely able to breathe. Blackwood starts to fuck her, hard and deep, her pussy seizing up around his cock to form the tightest hole ever. Her entire body starts trembling from the currents coursing their way from the inside out, and you see her juices cascading freely onto the carpet in a long, thick stream. Gemma starts to convulse all over the desk as her body is wracked with pain and pleasure, as Blackwood takes her roughly from behind, his hips slapping up against her ass.

Just before he cums, Blackwood pulls the wand out of her ass, still vibrating with energy as he releases the button. He flips it around her hips as he continues to pound her, and presses it against her clit. The shock is immediate, her body jerking as the electrical charge arcs onto her clit and sends her over the edge. Her body, now freed from her total muscle contractions, begins to thrash about as both she and Blackwood cum at the same time, her walls clenching around him as her screaming orgasm tears through her from head to toe.

With a groan, Blackwood pulls himself out, his ejaculate spilling out of her as her body trembles from the aftershocks of the wand. He tucks himself back in his pants and pulls Gemma's head off the desk by her hair, his thumb pressing into her swollen lips.

“Next time,” he murmurs, “Make sure your company doesn't disappoint me.”

She nods, her breath still ragged. “Yes, Sir.”

You collect your things and pick up Gemma, her thighs sticky with his release. You almost feel sorry for her. You'll give her a good reward when you get home.