She takes all the remaining pills at once

It seemed like the pills were affecting her control and judgment. If there was to be a dick, Sarah didn't want it to be a tiny dick, the member had to be really big, she wanted to impress with how endowed she was. She took and swallowed all 17 remaining pills in one quick sequence.

Waiting for the effect, Sarah was disappointed that nothing happened. She then gave up waiting, thinking that it wouldn't take effect, or that maybe it would take a while, since she didn't know how long after she slept her tiny dick grew.

Realizing that there was no point in standing around waiting, Sarah followed her normal routine. She went to school normally, where she didn't feel anything unusual until the end of the first class, when her three inch dick got extremely hard.

As soon as the bell rang for the end of class, Sarah ran out the classroom door, going straight to the nearest bathroom. Only when she got there, she realized that Amy had run after her, worried about what could have happened.

"Sarah, what's the matter with you? Are you feeling ill? Maybe you'd better go to the infirmary." Amy said full of concern

"Sorry Amy, it's not bad at all. It's just that something incredible happened and I didn't have time to tell you. Turns out I grew a dick, a real and fully functional one. It's not big, but it's real." Sarah said

Amy looked incredulous, but her jaw dropped when Sarah lifted her skirt and pulled down her panties, showing her hard three-inch dick.

"You really have a dick now but, how did that happen?" Amy said

"I took some pills that I found in my brother's room and after a while it grew. I think it's small so I took more pills but nothing happened. I think something could very well happen later if it were to happen." Sarah said

Sarah then jerked off in front of Amy, who watched her in amazement. None of them were worried about anyone coming in there, as they were skipping school to do so and believed that everyone was in class. Sarah eventually reached her orgasm, which made Amy more excited.

After she came, Sarah expected her dick to become flaccid soon and was getting ready to put her panties back on, but, contrary to what she expected, her dick remained hard and got bigger, reaching 6 inches, becoming proportionally thicker. Her balls also got bigger.

"Wow, it finally got bigger. And besides, its still full of energy." Sarah said and started jerking off again, taking advantage of the new size of her cock. Amy, who was also impressed, made her stop immediately.

"Why are you interrupting me?" Sarah asked

"It's because I want it too." Amy dropped her own skirt and panties "I want you to fuck me right now."

Sarah, liking the idea, used her new dick to fuck Amy's pussy. The space was a little tight, but at the same time pleasant.

The friends continued having sex in the bathroom without realizing that someone had come in and seen them, and that the same girl was hiding on the edge of the wall thinking about what to do.

Luckily for them, the girl who saw them was Pam, who kept her futanari fetish a secret. Pam had only seen Sarah fucking Amy, but she still didn't know that Sarah had a real dick, thinking she was wearing a strap-on.

Pam just watched the girls having sex from the sidelines until Sarah came inside Amy, depositing her seed inside the girl, only then remembering the possibility of getting her pregnant.

"I'm so sorry, I should have taken my dick out of you sooner. And now? What if you get pregnant?" Sarah said

"If I get pregnant with your child it won't be a problem at all." Amy said and, seconds later, she felt a stretch between her legs. Looking down she was surprised to see that she now had a dick too. Her new cock was hard and three inches long, in fact both her cock and balls being the same size as Sarah's before. She looked at her girlfriend to comment on what happened to her, but saw Sarah looking closely at her own cock, which was still hard and had grown again, now measuring 9 inches, with her balls also having become proportionally larger.

Without them knowing, Pam saw everything, including their dicks growing, now knowing that they were real and had something that could make a girl grow a dick.

"This is getting amazing, every time I cum my dick gets bigger." Sarah said

"And look at me, now I have a dick too. Mine is quite small, but I hope it grows like yours." Amy said

Sarah and Amy were close to each other, comparing their dicks, when they were surprised by Pam, who simply appeared out of nowhere and grabbed their dicks, stroking them and sucking them.

They enjoyed the sudden intrusion and didn't try to stop the girl. Amy, being her first time, came quickly. After that, Pam let go of her and just continued sucking Sarah's dick, leaving the girl to just look contentedly at her own dick as it remained hard and, like her friend's, it got bigger and reached 6 inches.

Eventually Sarah came, the current amount of cum she shot being too much for Pam to handle, the excess cum that the invader was unable to swallow ran down and dripped onto her uniform.

With this new orgasm, Sarah's cock grew again, now standing at a foot in length, with her balls growing proportionately as was now expected by her. She was happy about this part, but she had a problem and realized that something must be very wrong. As much as she enjoyed the growth of her dick and all, it was just strange that even after she cummed so many times, her dick was still rock hard.

At this time, the bell indicating lunch time rang. Sarah lifted her panties as quickly as possible and threw her skirt over her dick anyway, at the same time she rushed her friend to do the same.

Amy complained as she was still hard, but Sarah didn't care and she had to obey. Sarah ran out of the bathroom pulling Amy by the hand, not realizing that they left Pam behind without understanding what they were doing while she examined her own panties and found her own hard three-inch dick that had just grown.

Sarah rushed Amy straight to the infirmary, not knowing that the excess pills caused the following effects:

1) Her condition is highly contagious, making her and anyone already infected transmit the condition to anyone who comes into contact with its bodily fluids, being stronger if it is cum.

2) The erection is permanent and does not go away regardless of how many times they cum.

3)If the infected person is a man, he will only develop a permanent erection and, each time he cums, his dick will get bigger. If the infected person is a female she will initially grow a dick and balls in front of her vagina, which will also grow larger each time she cums. The average rate of growth is three inches with each orgasm, which may vary in some people.

Now they have to race to find treatment before things get out of control.