Michelle leaned forward, her almost fully sheathed cock poking her in the chest as she rolled the dice onto the table. All the girls were extremely nervous about what might come up, and who might have to go. The dice landed on 'All' and 'Drink' which caused a murmur to come from the girls. Julia, who had just stopped sobbing began to shout "No! No! I won't! I don't care what it says, Im done!" She tried to stand up quickly and walk out, but the weight of her new appendage made walking different than before. She stumbled as she got up and began to walk away, but her cock suddenly became fully erect. Not quite ready for the massive erection, it caused her to fall on the floor, on top of her massive 9 foot elephant cock. She straddled it and tried to lift it but couldn't. After a few seconds of struggle, she cried out in pleasure as she shot a jet of cum down the hallway. "O-ok! Ill stay! Ill stay!" She shouted. Her cock stopped spreading seed, and began to slowly, slowly recede.
All the other girls, shaken at watching her friend be 'assaulted' by an unknown force, took sips from the container quickly. It had no taste and a consistency a little thicker than water. They waited for Julia to calm down and the transformation to begin, but nothing happened. Ashley spoke up "Maybe we all have to drink before it changes us, so we all change together. It did wait until we all went before, right?" The girls agreed, and handed Julia the bottle. She took a gulp like the other girls, but nothing still happened. "What's wrong?" Heather asked. Sarah picked up the rules again and read "DISOBEDIENCE IS DOUBLE" from the pages. "I think it means you have to drink twice as much Julia." She turned to look over at Sarah with fear in her eyes, but then looked back to her still almost full length cock. She took another gulp, making sure she drank as much as before.
Almost right after they could feel it throughout their bodies. Their muscles ached as they grew stronger to support their cocks and even future transformations without changing their muscle tone. More importantly however, was how it affected their minds. The fears and doubts they had about the game washed away, never to return, replaced by idle curiosity. They would want to continue, to play like it was a normal slumber party game. Their inhibitions were lowered, and it made them aware of how the changes would be considered normal. No one would call them out on having giant elephant cocks now.
Julia however got a bit more. She had double, which made her mildly obsessed about the salve. She would want to keep playing even after, and change more and more. Her inhibitions were lowered even further, making her more unpredictable than the other girls.
It took a while for the changing to stop, but when they did all the girls look around at each other and giggled. Julia retook her seat, and even began to semi stroke her cock. "Hey, since we saw how much I can cum, we should take our clothes off so they don't get dirty, and go outside so we don't make a mess of Heather's house." All the girls agreed, and stripped down. Outside they all sat in comfy chairs and let their dicks flop against the table they sat around. Julia even playfully smacked Sarah's ass on the way out, grabbing it a bit. None of them had been bisexual or lesbians before, but now with the cocks and lowered inhibitions, maybe...
Michelle passed the dice to Heather on her right. "Ok, what do we get now?" Heather said as she rolled the dice.