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Sorry it's been so long since the last post, but here are then next installments in Andrew and Nicole's growth adventure. When will it stop...


Parts 1+2+3: https://muscle-growth.org/topic/6460-dont-stop-parts-1-3/

Parts 4+5: https://muscle-growth.org/topic/6569-dont-stop-parts-45/



                Andrew lay on his bed stunned at the amount of times he had just masturbated. He thought it had to be a record to have cum almost thirty times in a 24 hour time frame, but his analytical thoughts were soon squashed by his raging hard-on. It looked absolutely massive compared to what he had barely swinging between his legs only two days ago.  He was so proud of his meat that he almost forgot about how jacked he was now. His right arm was noticeable larger than his left due to the pump he had gotten from jacking off so much, so he decided to hit the gym and test out his new physique. Hi cock got super hard just thinking about lifting weights. “Maybe I’ll hit the gym after a little self-workout…”


                Nicole was running some assays in her lab when she overheard a troubling conversation. “Have you seen our pheromone chapstick prototype Jessica? I can’t find it on my lab bench. I swear I just set it down there a couple of days ago…” Bret said. Nicole knew exactly where the chap stick was, but she wasn’t about to confess to stealing it so that she could make her crush into more of a man. And what a man he was shaping up to be.


 Nicole knew the chap stick was more than just capable of attracting members of the opposite sex. Through her organic chemistry knowledge she knew that the chap stick had certain properties that would enhance male virility characteristics including muscle mass, penis size, body hair, and sex drive. She had decided to put her knowledge to the test on Andrew who had been a meek and weak boy until a couple days prior when he had begun his true transition into manhood. Nicole had liked Andrew for a while, but now she was starting to find him irresistible. She started getting wet just thinking about his big dick and his new beard. It took everything she had not to start masturbating right then and there in her lab.


Meanwhile, Andrew was proving to be a monster in the gym. He had gone a few times before to try to build some muscle to impress the girls in his classes, but he gave up after a few days of not seeing any results other than a severe soreness and increased appetite. However after his (secret) doses of growth formula he was setting personal records like crazy. He hardly felt winded after more than an  hour of a grueling full-body workout, but he felt pumped. His muscles felt like rocks under his skin, and speaking of rocks, his penis had been hard as a rock since he left his house. He finally decided to take care of it and ran to the bathroom. Jumping in a private shower stall he started stroking his shaft and feeling up his now swollen muscles. His pecs felt like huge pillows, and the coating of hair on them was driving him crazy. He felt like a real man and wanted to cum like a real man. Nicole wasn’t around, but he had plenty of memories to work with and was orgasming like never before in just a few strokes. He felt like the orgasm would never stop, but it sadly did after almost a minute of constant and intense cumming.




Somewhat satisfied, Andrew returned to the weight room just as Nicole arrived for a light workout. She absentmindedly put on some of the growth chap stick believing it was just her normal chap stick. She had just started running on the treadmill when she heard a loud series of grunts coming from the weight room and decided to check it out. Surprise surprise, it was Andrew who was making all of the manly noises. To her surprise, he looked absolutely swollen. His pecs were large enough that she could lose a few fingers in his cleavage, and his legs looked like they were cut from diamond. His muscles weren’t as big as she would have liked (yet), but she was definitely getting turned on by her new manly boyfriend. His sweaty chest hair and beard were just confirming his newfound virility to her, and she knew she had to have him immediately.


“Hey Andrew,” Nicole whispered seductively into his ear, “How about we go hit the showers.” Andrew’s dick, which had softened up just a bit since his last monumental ejaculation, became instantly rock hard when he hear Nicole’s voice. He didn’t say a word to her, he just picked her up in his hot rippling arms and carried her to the shower area. As soon as they found an empty stall they got to work.


Andrew stripped off his shirt which was completely soaked with his sweat and revealed a chiseled six pack like Nicole had never seen before. Nicole, who didn’t know she had put on the growth chap stick, frantically tore off the rest of their clothing and started kissing Andrew all up and down his body. His 7” dick stood hard at attention, just waiting for the moment for Nicole’s lips to reach it. His balls were swollen and churning with huge loads of cum just waiting to be released.


Nicole started blowing him, and he almost lost it right then and there. It felt so good whenever she had her lips stretched tight around his rapidly growing cock. He briefly thought back to just a few days before when he was jacking off to this exact fantasy, and he couldn’t believe how far he had come (and cum) in such little time. After a few minutes of the best blowjob of his life, Andrew picked Nicole up and impaled her on his stick. She screamed and moaned in pleasure as she orgasmed immediately from the penetration. Her orgasm was driving Andrew’s dick crazy, and it took only a few more minutes for him to erupt. He was in absolute bliss and felt like he was cumming for an eternity (in reality it lasted for three minutes, but that’s still inhumanly impressive).


Completely exhausted yet entirely insatiable, the couple cleaned themselves up (not before a few more rounds of crazy sex) and headed home where their sexual marathon would never stop. All the while, Nicole was thinking about how much manlier Andrew would become and if she ever wanted to stop her not-so-little experiment.

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I cant wait for them to start exploring more and more, sex with each other is fantastic but there is gonan be a time when they will want to go for other people

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Sorry it's been a while, but more parts are in the works! Hopefully I'll have the next installments ready within the week.

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