Meg walked into Erika's bedroom and closed the door behind her. Erika had fallen asleep on the bed with her clothes on, though she hadn't pulled down her skirt back in place. Her penis was laying in plain sight between her legs; even soft, it had grown so much with the salve that it looked very out of place on her petite frame. Meg piled her clothes on the floor and approached Erika, gently shaking her shoulder to wake her up. Erika muttered something and opened her eyes.
"Meg..? Did I pass out? Why are you naked?" Her eyes widened in surprise as she noticed the changes.
"It's the salve, Erika! I accidentally swallowed some of it... I think you're not supposed to apply it locally after all. Unless you only want growth in one place."
"Oh... that would explain it..." Erika blushed a bit at the sight of her friend naked. Meg looked all grown up, like the girls in magazines, while Erika's body was more childlike - save for the thick thing between her legs. She felt a hint of jealousy.
"I should have tried ingesting it, instead of spraying this thing again. Look now..." Erika sat on the bed and the chunk of meat dangled heavily between her thighs with every move before resting on her laps, covered in patches of dried semen.
"Well, it's not too late I guess." Meg picked up the bottle from the bed and aimed it in front of Erika's mouth. "Open, we're going to make you better." Erika opened wide. Meg pressed the button and her friend gulped down what gushed out of the nozzle. A moment passed.
"It takes a while to work. You should remove your clothes too, because they probably won't fit" advised Meg.
Erika removed her skirt and shirt, dumping them on the flood next to the bed. Her chest was almost flat and she had no body hair at all. After a moment of silence, she started squirming.
"There's... something is happening. I feel all tingly now", Erika noticed. "Ouch! My tummy hurts!" She wrapped her arms around herself, bent in two on the bed. Meg watched as her friend's body seemed to spasm under her eyes. Erika was getting bigger - she was becoming taller, but was also developping very round curves around her hips. Breasts were also inflating, almost surpassing Meg's in spite of her smaller body frame.
"It's... it's working isn't it?" Erika asked between two growth spasms.
Meg looked down at Erika's groin; she saw the cock twitch and swell. It was growing alongside the rest of the body.
"I think it's affecting your penis too..." she said.
Erika stood up on the bed and examined herself, panting. She too had gone through puberty within a minute thanks to the salve - but the cock had grown in unison, filling the space between her legs. It reached 6 or 7 inches, and it was still soft. However she looked very feminine in all respects, with wide hips and a tighter waist. She cupped her breasts with her hands - they were very soft to the touch, and sported large areolas with prominent nipples.
"This is exhausting, I feel drained now!" Erika said before letting herself fall down on the bed with a sigh.
"Yeah, me too! Let's just sleep and figure this out tomorrow", Meg replied.
The bed wasn't large enough to accomodate them both properly now they were all grown, but they were too tired to set up a mattress on the floor. They turned off the light and slid under the bedsheets close to each other, falling asleep almost immediately.