There were only a few minutes left for the practice of cheering when Jen spit out another pill. She and Claire then pretended they were just a little thirsty and stopped for a while to drink some water. They did not choose who to give the pill to, but decided to leave it to luck by taking one of the bottles of water intended for the team members, put the pill that dissolves quickly inside, and put it back in the box filled with equal bottles.
Jen and Claire continued for the rest of the practice as normal as they could, learning some new movements that suited their current body, while they could feel Lucy wagging her tail all excited with the exercises. When it was finally over they stood in a corner watching the other girls on the team closely while they took water bottles and drank to see which one would take the bottle she had put the pill in and start to transform.
Ten girls had already taken their water bottles and drank and nothing had happened until someone took the adulterated bottle. Who took the bottle of water with the pill was Maya, the vice captain of the cheerleaders. Immediately after taking some of the water, her clothes disappeared completely, then her vagina was pushed forward so that it could continue to exist when the space between her legs ceased to exist as they merged. Soon Maya's fused legs went limp and stretched into a long tail, which the conjoined girls thought she was turning into a lamia, but the long tail didn't get scales and didn't taper, but when it reached 15 feet of length the skin at its tip opened to reveal the tip of the huge dick that her legs had turned into. Then her breasts grew enormously, merged and her nipples disappeared, becoming what was clearly her balls, as big as Jen and Claire's were when they were Lucy's dicks.
The girls realized that Maya had not yet taken all the water from the bottle, which they believe she would still transform more, but the dick-lamia simply looked away and deftly crawled towards a guy who was watching her. The guy was Miles, her boyfriend, who as soon as she reached him hugged and kissed him showing that he didn't even notice the transformation that his girlfriend had just gone through.
Miles was a member of the athletics team and had also just left training, so Maya gave the rest of the water for him to drink, causing him to transform too. Quickly his face took on female features and his hair grew long, then a pair of H-cup breasts grew on his chest with his nipples turning into a pair of 11 inch sticks each, his original cock disappeared completely giving way to a vagina, which grew so large that it left her crotch and occupied almost the entire belly, with her having her clitoris between her breasts. After that they learned that in reality, Miles was called Nadia and that apparently they had become even closer than before.