Taboo was already prepared for that!

"Don't worry son, I've got it covered, you just concentrate on getting Ultraboy to fill the vats up!"

Pleasure smiled as he resumed his pounding of Ultraboy, making sure to target the young heroes sensitive prostate, it didn't take long before Ultraboy whimpered as the vacuum pump drew out another load from his meaty ballsack. That load filled up the first vat, which pleased Taboo, who quickly disconnected the pump attached to Ultraboy before he pressed a button on a controller which opened a hole in the floor beneath the vat, a second button lowered the first vat to a hidden refrigerator in the villains lair for their own experiments.

After closing up the hole, Taboo pressed another button which wheeled in the second vat, which Taboo quickly connected to the vacuum pump that was connected to Ultraboy's stiff cock. Pleasure smiled as he hammered Ultraboy relentlessly, only stopping to allow his father to switch the vats over. Once the third vat for Dr Bluder was full, Pleasure stopped fucking the hero to allow his father the chance to switch to one final vat. Once that was all hooked up, Pleasure resumed fucking Ultraboy, who was becoming a babbling, drooling mess from all the orgasms he'd been put through.

Once this final vat was three quarters full, Taboo produced another syringe and injected the contents into Ultraboy's ballsack, making the young hero wail.

"That injection I just gave you, will allow your cock to go flaccid after you cum one more time and then Pleasure, you can breed his ass!"

Ultraboy whimpered as he knew he was helpless at the hands of the two villains and resigned himself to his fate. Pleasure smiled down at the weakened hero and leant down, capturing Ultraboy's lips with his own as he found Ultraboy's prostate, making the hero moan into his mouth as he came hard, filling the vat. Once Taboo saw that the vat was full, he turned off the vacuum pump and disconnected it from the vat, sending it down to join the first one in the refrigerator. Taboo then removed the vacuum pump from Ultraboy and stepped back, smiling as Pleasure began his final few thrusts.

Ultraboy could feel Pleasure's cock thickening inside him and he could feel Pleasure starting to get a bit breathless as he neared his own climax. Pleasure broke the kiss and straightened up, his breathing getting heavier and heavier before he gave one last thrust, burying his cock as deep inside the helpless Ultraboy as he could before roaring out his release, flooding Ultraboy's bowels with his mind-controlling seed. Taboo watched as Ultraboy's eyes rolled back into his head before they came back with a blank stare.

"H-How may I serve my masters?"