She already knew.

"Congratulations," Gemma coos upon your return to the office, already beginning to strip off your clothes. "You deserve a reward."

You climb onto the desk on your hands and knees, your knees spread wide as you arch your back, presenting your ass to her. The cold air hits your exposed hole, and you shiver, but you're not sure if it's from the cold or from the anticipation. The position is humiliating, but your cock - pointing straight down at the table - is already dripping. Gemma stands beside the desk, her hands gripping a thick, veiny dildo, already slick with lube. You shudder as she runs her hand down the curve of your spine and presses the wet tip against your hole.

There's no warning, no teasing. She slams the dildo into your ass with one brutal thrust, knocking the breath out of you. You groan, your cock twitching and leaking all over the tabletop as she pulls back and hammers into you again and again and again. The sound of the toy slicking in and out of you fills the room, the wet, obscene noise mingling with your ragged moans. Her pace is relentless - her fist, gripping the base of the dildo as she pistons it in and out of you - slams against your ass with each snap of her wrist.

Your cock is aching, throbbing with every jolt, and you whimper as her free hand reaches under you and takes hold of your shaft. Her grip is punishing, working your cock in perfect rhythm, milking you in time with her thrusts. Her fingers swipe over your quivering tip at the exact opposite moment the dildo bottoms out, each alternate stroke causing explosions in your body back and forth from front to back. The whole time you're teetering on the edge, your body trembling with the effort of holding back until your Mistress permits it.

“Pleeease…” you beg, your voice hoarse, unable to take it anymore. “I can’t....”

"You can... now," she whispers approvingly, running her nails across your balls.

A torrent of cum gushes forth from your turgid cock just moments before you black out, blissfully content with the world.

THE END.