Long enough for Ultraboy to fill the vat!

Ultraboy groans at Taboo's words and fires another few ropes of his super spunk into the vat, pulled from him by the vacuum. Taboo smiled as he saw the vat on a screen near him at one third capacity, he gave his son a deep thrust as a reward for drawing out their soon to be pregnant ****'s precious seed. Ultraboy whimpered as he saw that the vat was just over half full and the realization set in that he had a long way to go, tears started streaming down his face as his impending fate set in. He would become nothing more than a breeding factory for Taboo and Pleasure.

It was at that moment that Pleasure's seed started taking hold and another vision started to dominate Ultraboy's mind, it was of him and Pleasure both happily cradling their pregnant bellies and try as Ultraboy did to shake that image out of his head, every time Pleasure's cock rubbed on his prostate as Taboo drove his cock into his son's ass, the vision got stronger until Ultraboy's eyes crossed and he came again, filling the vat two thirds full.

Taboo smiled as he saw what Ultraboy was looking at and telepathically told Pleasure that Ultraboy was weakening, one strong usage of Pleasure's powers and words would completely break the young hero. A breathless Pleasure silently nodded and charged up his powers, his hands glowing pink, before he reached around to Ultraboy's pecs and started rubbing the nipples while also whispering words in his ear, telling him how hot he'll look all pregnant and glowing. Ultraboy moaned as Pleasure's words and motions kicked in, combined with the fact that Taboo had told his Son to trigger Ultraboy's final climax which in turn would trigger a chain reaction.

Pleasure made sure to only target Ultraboy's swollen and sensitive prostate with every thrust, his Dad helping by speeding up his pounding of Pleasure's ass, which, with the words and the rubbing of the nipples finally snapped Ultraboy's weak resistance and he let out a roar as his cock spewed out rope after rope of his super-seed which completely filled the vat. Taboo had the presence of mind to turn the vacuum off which made Ultraboy breathe a sigh of relief as the **** of his cock finally stopped, Pleasure whimpered as he came again in Ultraboy's ass, reinforcing his control over the young hero, which in turn tightened Pleasure's ass around Taboo's cock triggering his orgasm, he flooded his sons anal passage with his super-spunk and kept his cock in until it deflated, making sure that no seed escaped.