John Makes It Worse

"I... might have some uh... counter-agent in the bathroom. Let me check." John excused himself and left Sam and his throbbing tower of a cock alone for a moment. John actually just wanted a moment to think and to snap his fingers without Sam watching. He had a feeling that he wouldn't notice it, but then he just felt better doing it alone. Pondering what to do to Sam, if he should him just shrink back to his original size, or keep him at like 10 inches he couldn't stop thinking about how silly Sam looked with that gigantic dick. And that thing would keep growing indefinitely probably considering how he had worded those pills into existence. Somehow that image of Sam balancing an impossibly huge dick in front of him made him chuckle up to a point where the worse got the better of him. Sam was going to get a little lesson out of all of this, and since he could snap everything back to normal, even make everyone else forget, John for sure wouldn't hold back...

"Here, it's the last one." John handed a pill he had conjured over to Sam. Sam's dick was half-erect by now, which made the whole thing look even funnier. A cock a good 2 feet long hovered in front of him, swaying dramatically with even he tiniest move Sam made. "They will stop the growth, but I mast warn you: there will be side-effects. Severe ones."
"S-side effects?" Sam grabbed the pill and somehow he understood that he messed up and that those was his last chance. "What kind of side-effect?" he wondered as he looked for something to drink.
"Hard to tell. Basically anything can happen." John tried to stay as serious as he could, given that he perfectly knew what was going to happen.
"Like... uh... what?" Sam seemed scared, truly scared.
"I don't know." John pretended "You seriously overdosed those other pills, so your guess is as good as mine. But the alternative is that this thing keeps growing till you can't move anymore, and that's probably going to be worse." Sam stared at John for a moment as he pondered his options, but eventually realized that John was right. Nothing could be as bad as dying from a cock too large for his body. Probably. He took all his bravery and gulped that thing down. It took just a few seconds before he felt a tingle spread through his whole body.

"Oh fuck..." his voice started shaking "I don't feel so good." Losing his strength he slumped onto a chair and begun to breath heavily. "What's..." he stammered, but then his cock suddenly came back to life. Within seconds he sported an erection harder than steel, harder than he had ever been, and it made him wince from the pain and the pleasure. "What is... going on..." he panted hard as that insanely erect cock sent urges into his mind that he just couldn't ignore anymore. "Fuck... I can't..." his hands moved on automatic.
"No!" John yelled at him "It said that whatever you do, you must not masturbate until the pills are done with their effect!"
"I... I am... trying..." Sam focused as hard as he could, but that overwhelming need to get off won eventually. With every pump of his dick he felt it grow larger, and so did his balls.
"Sam, you need to stop!" John warned him one last time, but made no move to stop him. This was all part of the plan after all.
"I... I can't..." Sam was to his tears. Never in his life he had been this horny, he couldn't have even imagined that anyone could be this horny at all. All that his mind was capable of thinking was to get himself to cum, while the last bits of resistance tried to fight it. But it was a futile fight, rigged against him from the start. Eventually he came, and never did he await relief as much as this one, even though every part of him somehow knew that he screwed up even further.

"Why didn't you stop?" John asked as he examined the impressive amount of cum that Sam had distributed through half his room.
"I couldn't... I was just so horny, I..." Sam stopped and sobbed for a moment. "I am so sorry."
"Well the mess I can clean up... somehow." John gestured at the juice that was now almost everywhere. "But what it did to your dick... I have a bad feeling no one can fix that anymore." Both stared at that ridiculous boner Sam sported now. A cock wide as his leg, reaching from his groin way past his head, almost a good three feet further up. It was so big Sam could barely look past it, as a good half of his vision was blocked by his own dick now.
"It's so fucking hard..." he mumbled. Nothing had changed about his state of erection after he came, and anyone could tell that his body was not capable of holding even a fraction of what had to be stored inside that monster.
"Let's hope at least the growth has stopped." John teased him further, but Sam was already lost in desperation.
"I can't live like this!" he cried. Given John had expected him to not be very happy about the result, that reaction however was bit too ****.
"You can and you will!" he ordered him "Your dick will eventually start shrinking again!" He made that up, but with his powers he would turn it into reality later. "Just give it some time."
"Time?! I am a total freak!" Sam sobbed "And this thing makes me so horny, even right now I can barely keep myself from wanking off..."

It took John a good fifteen minutes till he had Sam back to his senses, mostly. This had totally killed the mood for John, but he didn't want to just let him off the hook that easily either. So he decided that for now Sam would have to stay like that, but his dick would slowly grow back over the course of the next two weeks to a size he had yet to determine. Also just to make sure he secretly snapped the world into a state where Sam wouldn't get into any big trouble with his new size. After all it would be kind of boring if he'd just hide in his room for the next two weeks. Eventually he had Sam at a point where he decided to at least try if he could get up and walk with that monster. Carefully he moved off the chair, stood up, and learned that not only he could somehow carry that extremely heavy asset now, he also just barely did not poke into the ceiling.
"Fuck, I don't even know how I can stand up straight with that thing." Sam wondered. John knew why, but he obviously couldn't tell him. "Also what's that weight belo... HOLY FUCK!!" Sam suddenly yelled when he realized that those extra weights dangling around his legs were actually his balls, each now bigger than a fully grown melon. "What the fuck???"
"Yeah those also grew." John gestured. Sam stared at him with his eyes wide open.
"How am I supposed to even get through a door with those?!" he couldn't stop staring at that gargantua nut sack, while his mind tried it's best to process that those were truly his balls. Carefully he run his hands over them just to make sure what he saw was real, and it was.

"I mean it could be worse." John eventually tried to calm him down "If you hadn't taken the pill that would have been your size anyways, but you'd be growing even bigger. Now you are at least shrinking." It did little to calm Sam down, but a flicker of hope eventually appeared in his expression.
"So like two weeks you say?" he run his eyes up and down that shaft once more.
"More or less." John oracled.
"Fuck, I probably be jacking of all day long." he let out a faint groan "You cannot imagine how this thing is affecting me." His hand already started slowly running up and down on his skin "And those balls probably produce so much cum that I just need to empty them constantly..." His breathing started to become faster again, and so were his hands. "Fuck... I am so sorry... I can't stop it..." Seconds later he got lost in his primal urges again, ignoring everything else, that John was around, that he was in his room, that he had no plan what to do with the juice that would come out of that monster. The only thing his mind was capable of focusing on was to get off. And merely a minute later he managed to get himself over the edge again. And he had been correct: those balls did produce cum at an insane rate, and pushed his load to an even more insane volume.