-Friday afternoon at Sofia’s house-

"Okay, by synthesizing this formula I could be able to grow specific parts of the body or the whole body if applied in huge quantities." Thought Sofia as she looked through a microscope.

After spending several hours working, Sofia had managed to synthesize the formula to make it work in the parts where it was applied, however she had not been able to make the side effect of increased libido decrease.

Sofia had managed to make the growth serum applicable by using an atomizer.

"Excellent, this is all I needed, now it’s just a matter of applying it and seeing if it works..." She said while she looked at her reflection in one of the cabinets in the lab. "I think there’s no better test subject than myself" She said as she directed the atomizer towards her little bust" Splash! Splash" "With two applications I think it will be enough, and one here" While the last application made it on his already big ass.

"Time to go to bed, tomorrow I’ll talk to the girls, apply some of the serum on them and see what happens."

-The next day- 

"Yaawn! Wow I slept well, I had not felt like this since the summer, well hands to work, it’s time to put some clothes and prepare to go to the shopping center... Huh? strange I do not remember my slippers fit me so tight, anyway I will take a shower and get dress"

While Sofia was heading to the bathroom she hadn’t noticed that her pajamas were now a little tighter than normal, her blouse now shows a bit of her belly and the sleeves reached the middle of her forearm the most amazing thing was her bust, now it had grown 4 or 5 sizes, If she stood on her side, there were beautiful curves that ran through her torso, and not only had her torso grown, but her legs had stretched a little bit and the feet too, but what was most noticeable was her huge butt, that had grown enough to make the pants of the pajamas not able to completely cover the curvature of her buttocks.

"Ah that water so delicious, it’s strange I feel a little horny, that affair with Mr Jones left me a bit hot, but I can’t help, it felt so good having his body inside me..." While Sofia started masturbating, she didn’t realize that with her new measurements any movement she made was a bit disastrous. 

Crak! “Ow what did I do” Sofia had broken the curtain of the bath when she lean against the curtain. “Damn what’s happening to me, I must hurry the girls are already coming.“

Sofia had interrupted her fantasy and started dressing. "That’s weird, I don’t remember this dress was so short, if I bend or climb up stairs I’ll end up showing my panties, but what?..." It was here that Sofia gave a big sigh and realized that her serum had worked her breasts now filled the neckline of the dress, and her now double large ass, that with every movement she did by walking made up her skirt a little. "Oh, hell, that’s a problem, but it doesn’t matter anyway we’re going shopping, I can go to that new store and get something my size."

Ding, Dong! "They’re here."

Sofia full of excitement ran down the stairs, her arousal was such that she could not notice that the movement of her tits had caused her nipples to pop out a little bit from the neckline and the huge valley between her butt cheeks devoured the back of the dress.

"WOW!" said Dahyana and Wendy in unison.

"What happened to you?" said Wendy.

"Where did you get that pair?" said Dahayna pointing at the huge breast of Sofia.

"As you can see the serum is working" said Sofia as she took a walk around to show them her body.

¡Hahahaha! Wendy and Dahyana couldn’t stop laughing, they had noticed, that part of the dress was caught between her huge butt cheeks and how with that movement her tits had pop out of the neckline.

"Don’t laugh, I still don’t have new size clothes," she said as she rearranged the clothes. "Well follow me and I’ll show you." 

The trio had gone down to the laboratory.

"Here it is," said Sofia, showing them the spray with the serum.

"I think it’s too little, don’t you think?" said Dahyana.

"Is it safe?" asked Wendy.

"Relax, everything will be fine, who wants to try it first?"

“ME!. Dahyana shouted as she pushed aside Wendy to get in front. 

"Well, where do you want me to apply it?"

"I want a little more ass and I’d like to grow a few inches."

"All right, let’s see, turn around, I’ll just splash a little bit here... Splash! Splash! While Sofia applied a dose to each of her buttocks, Dahyana took two vials of serum that she had near and hid them in her bra.

"Now turn you I will spray all" Splash! Splash! Splash! Splash! Well this will be enough for you to grow about 20 centimeters.

"Don’t you think it’s a lot? I say Dahyana is already quite tall, with those centimeters will reach 1.80" said Wendy.

"Calm I can also apply to you, would help you win the professor Jones or at least make you wear a real bra and not the sports that you usually wear. 

"Stop, don’t bother now, I don’t want you to spray me with that."

"Well you miss it" replied Sofia.

"Okay I’ll do it, but first I want to see what happens to Dahyana."

"Ehm girls, I feel strange my body" said frightened Dahyana.

As her body began to tremble and a sweet scent emanated, Sofia and Wendy watched in amazement as their friend began to grow, First they noticed that the pants she was wearing now almost reached her knees and the blouse started to shoot the buttons that contained her huge breasts. When it all stopped, Dahyana had reached two meters which for a 14-year-old girl was extreme, luckily her huge attributes had grown in the same way as she.

"I don’t understand, because with you it worked so fast," Sofia said.

"I don’t know how you care about that now, see Dahyana is half naked and two meters tall, and her clothes are about to break, how we’re going to the mall like this." Said Wendy scared.

"I wouldn’t mind going like this," Dahyana replied. 

"Ahhhh I think I have a long dress could help her, at least until we get some clothes," Sofia said as she ran to her room to fetch those clothes. "Now that I think about it, I think it worked faster on her because they were her hormones after all, we’ll have to be careful, this dose made her grow more than expected". "Here you go, try it on," said Sofia as she passed the dress to Dahyana.

"I don’t think it’s going to hold for long, so we should hurry up and get to the mall," Dahyana said. 

"Fine I’ll take some shrink vials just in case we need them and I’ll also take one of growth for you Wendy when you feel sure, Said Sofia while she put everything in her bag, What she could not notice were the two vials that Dahyana carried between her breasts and the fact that the vials she believed to be shrink were actually growth vials.

So the three girls headed to the mall while stealing looks as they walked through town, Dahyana with her huge breasts about to come out of the dress and her spectacular two meters high that did not leave much to the imagination when they reached almost as high as her buttocks.

And Sofia who stole looks with the movement of her ass, and her huge bust inside that little dress.

Wendy followed them closely, her eyes being clouded by the huge bodies of her friends, and she had begun to regret not having sprayed the serum.

When they arrived at the mall, it was the moment that the whole disaster began.