Ace felt her belly heat and begin to melt. For whatever reason it looked as though this was going to be a night to remember. The head groom unfastened their leashes and then went to stand by Scott Holroyd and slowly unbuttoned her crisp white shirt, shrugged it off and then unclipped her immaculate, pale pink bra, releasing her neat, rosy-tipped breasts that trembled and shook cheekily as she folded the garments and stacked them tidily on top of the cane rack.

"Mount the tubby one over there. Bring Ace over here," the trainer ordered.

Her trainer took charge of her and quickly fastened her into a frame in full extension - her wrists and ankles fastened to the corners, then he made her open her mouth and buckled a ball gag onto her. He stayed with her long enough to stroke her breasts and make sure her nipples were erect and then he felt between her wide spread thighs and grinned knowingly at her as his fingers encountered the warmth and moisture in her vagina, then he left her.

Ace's eyes followed him across the room to where Tracey was now mounted and ready for the first action of the night. She stood with her legs braced apart and her wrists raised and clipped to the ends of a spreader bar that hung from the ceiling above her. Her large, pale-skinned breasts stood out proud and vulnerable from her chest as the trainer took up his position in front of her. Tracey's eyes were fixed on the tails of the flogger, but she managed one glance across to Ace, her eyes wide above the ball gag before they started and Ace knew what she was going through, fear and excitement and anticipation of the devastating orgasms that lay on the other sides of the delicious pain that was about to scald her. And behind the quivering girl, Ace could see the head groom raising a riding crop in readiness. Then the trainer struck first.

He swung the heavy-tailed flogger straight across the crowns of Tracey's breasts, the tails fanning out as they struck. She hardly had time to flinch back before the riding crop smacked across her shoulders from behind. A gag muffled groan escaped her as she arched away from that pain and thrust her quivering tits straight at the trainer's flogger which struck exactly where it had before. This time Tracey let out a low growl as she tried to twist and the crop cut across her bottom this time. With her ankles shackled, Tracey could do no more than she had before, which was to arch her back. Their trainer was ready for it and this time moved slightly so he could lash her forehand and backhand in quick succession. The lush mounds of breastflesh swung ponderously across Tracey's chest and then lurched as she reacted to the swipe of the crop across her shoulders again.

Ace watched in agonised envy as Tracey's eyes began to roll upwards and still the two dominants worked on her, she was sinking into subspace under the relentless thud and snap of the lashes and by the quivering in her thighs, Ace could see she would be coming soon. But they were far too experienced to allow that to happen just yet. They stopped as Tracey was beginning to pant around her gag and cry out in time to the lashes she was taking. In the wake of the beating stopping, her head lolled down between her upraised arms and Ace thought she looked wonderfully erotic as the red marks slowly bloomed across her heaving breasts.

Their trainer went to a table and picked up some wrapped needles, came back stripping their paper off and with no pre-amble at all, took Tracey's right nipple and half pierced it with one strong thrust. He took hold of the deep red, thick tube poking rigidly out from the tawny areola, thrusting eagerly forward for its next dose of treatment and pushed the needle into it. Tracey yelled through her gag but made no move to raise her head or look away as her trainer paused and then pushed again. Ace knew that Tracey would be watching as her tender flesh peaked at the far side of the nipple as the sharp steel pressed against it, then burst through. And sure enough Tracey gave a sigh as she saw herself pierced. She watched closely as her other nipple was pierced, then her trainer picked up a smaller flogger. Although it was smaller its tails were even more rigid and square than the first. The very first lash - downwards onto her left breast, fetched a shrill yell from behind the gag and then the head groom stepped in with the crop again and this time Tracey was allowed to go all the way. The lashes kept falling until she was twitching in the aftermath of an explosive climax that had made her spurt her juice onto the floor below.

Ace was desperately trying to close her wide spread thighs, anything to try and assuage the aching void in her belly. Her whole body was awash with the need for an orgasm and her trainer and head groom were well aware of it. She watched from beneath carefully lowered eye lashes as he approached and began to manipulate and tease her breasts again, stroking gently, flicking the nipples lightly. She was crying out for domination and pain, not tenderness, and groaned from behind the gag.

"You're a whore, Ace. A whoreslave. A machine for giving pleasure. If I told you I'd enjoy it, you'd stick needles in yer own tits, wouldn't you?"

Ace knew she wasn't really being spoken to. Mister Holroyd was just thinking aloud, so she simply moaned her agreement incoherently but unmistakably. He laughed and stepped back. From nowhere the crop landed across her shoulders. She jerked forward against her bonds as the bruising blow from the shaft of the whip slammed across her and the sting from the leather keeper at the end added its venom. Calmly her trainer twisted her left nipple savagely as a second slash from the crop sliced into her buttocks. She yelled into her gag as pain blazed across her rump, but then Mr Holroyd's other hand went between her legs and Ace used her stomach muscles to thrust her hips forwards to meet him as he sank his fingers straight into her vagina and his thumb began to grind at her clitoris. The crop slashed again and she tried to buck even harder, racing upwards now towards a towering orgasm, she even dared look at him as he worked her.