Paul felt his urethra stinging after the massive deluge of his hyper son's super baby semen had forced its way into his cockhole, and his balls ached with a dull throbbing not unlike the worst blue-balls he'd ever had. Looking down at his cum plastered groin he could see his balls had inflated easily to the size of eggs, his ball sack feeling stretched and heavy with the extra jizz. His dick itself hadn't changed much in size, although its shape looked a bit wider to him, with his piss-slit gaping slightly and still dribbling out a slow stream of his own baby boy's ultra virile baby batter.
Paul's spongy head was red and angry still after the aggressive orgasm it had been forced to take the wrong way down and Paul trepiditously reached forward to touch it, pinching it softly as though he could have forced it back closed, and gently rubbing his glans to soothe the irritation.
As he did so, a thought entered his head unbidden: he could finger his own dickhole.
The thought shocked him, as he had never considered something like this before, and the thought of sounding himself frightened him, but he couldn't help himself. Reaching forward with his index finger, he played with his own cock's opening, rimming it as though it were his wife's labia and he was hunting for a clit.
As he played with himself, he quickly concluded that his pointer was too big, but his pinkie might just fit. Kneeling in the puddle of cum he just endured, Paul licked his pinkie finger, tasting the salty sweetness of Henry's orgasm all over his body. He dips his finger back into the puddle of jizz, scooping some up in his other hand to further lube up his cock, inside and out, and then lifting his limp dick, pressed on his urethral opening gingerly. Slowly at first, his cock swallowed his little finger till he reached his first knuckle, careful not to scrape himself with his nail. At first the burning intensified, his cock not ready to be penetrated by anything much less a finger, having just now been stretched out. But after taking a sharp breath, Paul pushed further in until his dick had swallowed his second knuckle, then all the way to the base of his pinkie.
The feeling was intense.
Paul half expected to be in incredible pain, but rather he was starting to feel pleasure in a new an exotic way. He pulled his finger out partway, leaving a vacant empty feeling inside himself, then plunged his smallest digit back down all the way.
The feeling was incredible!
Paul began to piston in and out of his slowly growing erection, his urethra slick with pre keeping himself moving, as the pressure built up, tightening around his finger and applying that same pressure to the sensitive inside of his newly abused hole. When his cock was fully erect, he was no longer able to pull his finger back out; the tight muscles of his dick holding himself completely in place.
So, with his off hand, Paul quickly began to jerk himself off, squeezing his cock as tightly as possible around his own finger plugging up his penis. He had never experienced as pleasurable a handjob as what he was giving himself, rubbing his boy's cum into himself as he masturbated, hips jerking with a mind of their own, feeling a rapidly welling up orgasm deep inside despite having just cum moments before.
His eyes rolled back into his head, and his tongue came out of his mouth as he involuntarily pistoned his hips into his hand, the finger inside his tight hole holding in place as his balls contracted in his sack, and his dick began spasming uncontrollably.
Paul stifled a scream as his orgasm came, but ultimately didn't cum. His finger stuffed into his tight prick held his orgasm inside, intensifying the feeling of needing to cum. With his orgasm blocked from release, his cum begins going anywhere else that it can, pushing through his prostate creating a sensation almost like having his asshole fingered at the same time, his cum filling up his bladder and pushing through his tubes back into his testicles. His balls ultimately swelling up larger than before as his own orgasm is forced to go somewhere. Paul slowly comes back down from this dry orgasm, panting and breathing deeply, the blue ball like pressure worse now than ever before, his individual nuts had swollen to nearly the size of tennis balls, and his nutsack was stretched taut with all the excess cum that had been added.
Breathing deeply, he felt his dick begin to soften around his finger, loosening enough to wiggle it around inside his now very abused dickhole.
As he was taking stock of himself, still in a stupor from his most recent orgasm, a soft noise brings his attention back to the present moment, and the realization that he had just jerked himself off while cramming something into his dick, kneeling on the floor in front of his hyper endowed son in a massive puddle of jizz.