There was quite a lot of noise coming from Josh's room and not the kind that there usually was. Most often, you'd hear the sound of him playing video games, but this time there was the sound of bed springs creaking and two voices moaning. For right now, Josh was having passionate missionary sex with a very attractive young woman.
It wouldn't have been a surprise for Josh to bring a girl up to his room eventually, but Josh was doing it 4 years in advanced. Instead of being a 14-year old boy, he was now 18 years old thanks to the blue shampoo. The promise his body showed as an athletic boy had been fulfilled. He was considerably taller than what he had been before and his muscles were defined, even not overly-developed. After all, his preferred sport was basketball which called for a leaner physique. But his cock was not limited to that as the moaning woman beneath him would testify.
The woman herself was also someone to consider. Her tan body was covered in a sheen of sweat that increased her appeal. She had generous hips and buttocks, a trim waist, and plentiful breasts that she was currently groping. She had a gorgeous face with brown eyes and browner hair cascading around it. It was hard to believe this beauty was actually Jennifer, a friend of Josh's little sister who had been 7 years not too long ago.
"Josh..." moaned Jennifer as she wrapped her luscious legs around his waist, "I'm gonna cum..."
"Almost...there..." grunted Josh as he thrust even harder. In a few seconds, they both let out a loud moan as Josh's cock let loose a large spurt of sperm into Jennifer. They panted with exhaustion as their fatigue started to catch up with them. "I think...I'm done...for now..." panted Josh.
"Three...is a lucky number..." panted Jennifer.
"You'll have...to settle...with two..." panted Josh as he pulled his softening dick out of Jennifer. It was quite an accomplishment to have been able to orgasm twice in a row, but even Josh's grown body had its limits. He rolled to the side and laid beside Jennifer.
Jennifer could hear the blood pounding in her ears as her blood pressure slowly went down. She was enjoying the sex a lot and she could feel like going for more rounds. But even she was starting to get a little worn out and Josh won't be able to 'reload' for awhile. If only there was a way to speed up the recovery time. That's when she got an idea. "Hey...what about the shampoo?" she asked.
"What about it?" asked Josh.
"We could use it to get just a little bit older. Then we'll be recharged and ready to keep going," said Jennifer, already feeling more energetic from the idea.
"Not a bad idea," said Josh thoughtfully, "Where's the bottle?"
"I thought you had it," said Jennifer.
"Well, I did. I used it on you in the backyard and we walked back into the house. Did I bring it back inside with me?" asked Josh. He looked around, but there wasn't any sign of the shampoo bottle being nearby. "Guess I left it out there," he said as he started to get up.
"Whoa there, I might appreciate that body of yours, but you don't want the whole neighborhood seeing it," said Jennifer.
"I'm not going out there in the buff," said Josh as he looked around. He soon found the gym shorts he had been wearing earlier that day. He pulled them on and adjusted for his larger waist. They were a little on the tight side, but they will do.
Jennifer also got up and started looking around for something to wear. She definitely couldn't slip her swimsuit back on, it had barely survived her transformation and her taking it off. She eventually slipped on another of Josh's gym shorts and one of his T-shirts. They were a less proper fit on her, the shorts hugging her hips and ass tightly while the shirt was barely covering her breasts. "How do I look?" asked Jennifer as she posed.
"Not showing as much skin as your swimsuit, but still sexy," said Josh, his cock perking up a little bit.
"Let's hurry and get that shampoo so we can take it off," said Jennifer before they both headed out of his room.
When they got to the backyard, they found the kiddie pool empty. They assumed that Ashley and Brittney just went off somewhere to play and started looking around for the shampoo bottle. While they didn't find the bottle, they did find something else significant.
Jennifer looked down at the discarded swimsuits with concern. Those were definitely Ashley's and Brittney's and she had a feeling they didn't just change into dryer clothes. She picked up the bottoms, both of them were stretched and snapped at the hips. "I think I know who has the bottle," she said.
Josh frowned and said, "They couldn't have gone far with nothing to wear. But they weren't inside the house. You have any idea?"
Jennifer looked around thoughtfully. She noticed the house next door where she knew Jacob Marshall lived. She and her friends had talked a lot about Jacob over slumber parties, namely about Ashley's big crush on him. If they were both grown now, she had a strong suspicion that Ashley will want to do more than kiss Jacob. "Follow me," she said before going out of the backyard. Josh followed her as they went over to Jacob's house. Jennifer didn't bother with knocking and just walked right in.
Josh and Jennifer walked into the living room and were greeted by the sight of a naked couple making out on the couch. The woman was sitting on the guy's lap and had a very comely figure. At the sound of the duo coming in, she stood up and turned around. Her bust was even more impressive when looking at it from the front, it was easily a few cups bigger than Jennifer's. Her face was beautiful as well, though the green eyes and black hair were recognizable. "Hello, big brother," she purred, "Or should I say little brother?"
"Ashley? Wow, you really grew up," said Josh. He was not as turned on as he ought to be, considering this was his sister.
"Well, I am a full-grown woman now," said Ashley proudly.
"And you've finally scored Jacob," said Jennifer, able to get a better look of the naked guy on the couch now. He was more handsome than she had suspected he was and that dick was comparable to Josh's fine piece.
"Yep, though I feel a little bad about taking advantage of a younger boy. But then who wouldn't want to bone a 21-year old bombshell like me?" asked Ashley as she cupped her breasts.
"21? But me and Jennifer are only 18," said Josh.
"That's why you still look smaller," said Jennifer, "Well, me and Brittney used the shampoo a little longer than you two did."
"Did somebody call me?" The four of them looked to see Brittney walking down the stairs in a different towel which was hugging her curves tightly. She had her arm linked with a man's who looked like a slightly older and buffer version of Jacob and was also only wearing a towel. "Hey guys, glad you could make it," said Brittney to Josh and Jennifer.
Josh and Jennifer were rather surprised by how amazing Brittney looked now. Jennifer felt a little jealousy that Ashley's hips looked bigger than hers, probably with an ass to match. The man intimidated Josh a little considering how big and muscular he was. He didn't know who he was supposed to be until Jacob let out an astonished "Chester?"
The man grinned and said, "Hey Jacob. Guess I'm the big bro now."
"In more ways than one," said Brittney in a coy tone.
"What's going on here?" asked Jacob, completely confused by these turns of events.
"Oh, we've got a magic shampoo than can make you older depending on how long you have it in your hair before rinsing," said Brittney, holding up the shampoo bottle.
"And I think you know what's going to happen now," purred Ashley.