Feeling refreshed after a nights sleep Pyotr changed the dressing on his leg before dressing in jeans and a blue tee that matched his eyes. A quick protein shake later he was ready to resume training.

Pushing open the room the smell of sex was almost overpowering. Switching on the light he checked on the two cunts. Both were nearly unconscious from being fucked all night by the machines. He changed out the empty IV's and popped an amyl under each nose. Switching off the Sybians he also released the ties before grapping a fistful of hair in each hand and propelling the cunts to the bathroom. After watching them piss he settled for hosing them down with cold water as the IV's made showering a slower job.

The two were still barely awake but Pyotr could see the changes in them. The way fingers automatically reached for cunts, the way legs opened so the water would hit clits, the way they fidgeted and whimpered in need...

Turning off the hose he kicked it to one side and approached the pair. Eyes dropped to his cock as he reached for his zip. Although the cunts were now permanently wet for cock, it kicked up a notch whenever they saw one and he could smell the need, see the trembling of their thighs and juices dribbling from empty holes. Just like a good cocksleeve should be.

He indicated to his left and she dropped to the tiled floor, gratefully enveloping his cock in her hot mouth, moaning around him when he hit the back of her throat. Holding her hair tight he pushed his length deeper, forcing her throat to expand, to accept him, as she gagged and fought to breathe. She'd soon learn.

As he roughly fucked her throat her twin watched, whimpering and fingering her own hole. Pyotr watched for a minute then simply said "trakhnut' yeye" Instantly she crawled to her twin and started to suck and bite her tits while her fingers went straight in her slick cunt. The gasp around his cock told him everything. He upped his speed, slamming into her throat as the finger fucking turned into a fisting. The mirrored walls gave a perfect view as one small fist buried itself in her hole while her other dropped from tits to her own cunt. He allowed her desperate attempts to ease her need for cock since she didn’t yet know better. She looked like the cocksleeve she was, one fist in her twins hole and her other trying to fill her own. Both were near mindless with need as a small fist would never do more than increase the need for men to fill them. His cock grew even harder at thought of what was to come.

Eight of the slaves were already waiting. Four had naturally huge, thick cocks but the others were third generation slaves, brothers, bred specifically for cock size and trained not to cum until ordered. Their strenth and endurance was quite legendary.

He pulled out of the cocksleeve and walked away, knowing both would crawl after him like bitches in heat. Opening a previously closed door he briefly instructed the slaves on who was to go where before stepping to one side. The cocksleeves crawled in then paused at the sight of the cockfest on view. Annoyed at the hesition Pyotr pulled them forward by their hair, throwing them to the eager slaves.

Four men reached for each one, the naturals immediately impaling asses and dripping cunts while the other two held them in position, legs splayed wide, cunts dripping. The screams were garbled as they felt impossibly stretched and full but a moment later they were pushing back, unable to control the need that now ruled their lives. The natural bulls were used to this reaction and ignored them as the sound of cocksleeves being properly used filled the room.

As soon as the men had settled in Pyotr left to do some overdue paperwork. Watching bulls wasn't his favourite part of training though he recognised the vital job they did. The cocksleeve would get a cunt and tit whipping with each orgasm, inextricably linking pain with cumming in their minds. With a couple of hours training they'd cum on command at the sight of a whip approaching them. Another hour and the word would be enough. This was about training, not damaging them.

The slaves separated to opposite ends of the room. One stretched his cunt over a bench, shacklingy her wrist to ankle, keeping her bent almost double over a narrow bench. Stretching her sopping cunt with his fist he brutally stretched her further before forcing his cock in. He was proud to have been bred for size and his cock never failed to train these holes. Even after his fist she was painfully tight but her juices soaking him made the job easier. His creche brother was working on her ass, still gaping from the natural one who'd filled her at the start. As his fist stretched her further he reached for a custom tunnel plug, quickly replacing his fist with it, inserting it deeply, and securely.

While his brother continued to fuck her harshly he walked over to a cupboard and removed the necessary supplies. Inserting a wide tube deep in the tunnel he slowly poured the warm liquid in her ass. The position she was in enhanced the flow, assisting deep penetration. Helpless, unable and unwanting to resist, her cunt got even wetter as she knew men were using her as they wanted, that she was only holes to them. As her belly distended from the liquid her cunt clenched on the cock fucking it.

She simply loved being used as a cocksleeve, fuckmeat to be hurt and stretched, filled by cocks, by toys, by fists, used and hurt, however men wanted to take their pleasure. It was all she wanted to be, a dripping, needy piece of fuckmeat begging for use.

The liquid stopped pouring in and she felt movement as a tube was pulled out. A tight plug notched to the tunnel stopped her expelling the liquid. He reached around, compressing her belly several times, encouraging the liquid deeper. The bonus was it hurt the cocksleeve so she juiced more on his brothers cock. Glancing at the wall clock he got a fresh plug, tubing and liquid before crossing to the other fuckmeat.

She was shackled in the same position and another brother was fucking her hard although he'd also clamped her tits and clit and was pulling on the chain linking them. Her ass was already readied by his remaining brothers fist. Soon her belly was also swollen by the liquid and she was plugged tight. He really squeezed her belly hard and her cunt gushed on his brothers cock. She screamed as he attached weights to her tit clamps and yet more wetness ran down her legs, puddling on the floor. His brother twisted the plug as he fucked her harder, bottoming out with each thrust, while he pulled on the chain. Her agonised screaming was beautiful.

At a nod from his brother he yanked hard, wrenching the clamps free. As the blood flow resumed she convulsed on the cock fucking her, squirting and then screaming as she felt the lash on her tits, then squirting again when it hit her clit.

This one would barely need any training to link cumming with pain.

He continued to squish and squeeze her tits, twisting the nipples, stretching them out as far as he could. One of the naturals stepped over and rhythmically compressed her belly to get the liquid deeper, forcing her to make futile attempts to expell the liquid. She'd get used to being deep cleaned. Or maybe she wouldn't. It made no difference to them but either way it would happen because strong men wanted it and, like all females, she was simply a cocksleeve for use.