"I think i'll pass." Saira said smugly. It gave her an even greater pleasure seeing Krystal in this state of desperation. However Krystal was disappointed to say the least. She had been desperately craving a bull to fuck her and now she had one right in front of her. To come so close and still be denied frustrated her greatly, but she knew that it was only a matter of time. Sooner or later she would cave. "Screw you!" Krystal said sharply. "It doesn't matter though. You'll cave eventually! Just you wait and see." Saira tried to keep her best poker face, but it quickly turned to a frown. She knew that Krystal was right, whether Krystal did or not. She'd seen this thing before with gender changes and animal pheromones. Once the changes progress further it get's harder and harder to resist their natural instincts. Saira just had to hope that she could keep her mind strong.
Interrupting the tense situation between Saira and Krystal, Harriet piped up again. "Unghh.... Guy's? I think unghh.. Something's happening again. Looking back on the oft forgotten Harriet they noticed that she had grown in height yet again. Her skin had hardened all over her body, severely restricting her movement. Bark had risen to just underneath her breasts, which had swollen in size. They had taken on a golden hue and looked to be leaking something. Her hair had changed to a leafy green color and small branches now protruded from her head. Her hands had risen, and were lengthening locking into place as they did so. But the main reason for concern where her breasts, they looked like they needed to be milked.
"Can someone lend me a hand? Please? My breasts are aching. There full of some kind of sap." Harriet called out. Rebecca walked over and inspected the liquid flowing from her friends tits. She ran her finger over her teat, collecting a drop of fluid and licking it. "Hmm... It's maple sap. And it tastes pretty damn good." Taken over like a girl possessed she puts Harriet's boob in her mouth and begins to suckle on it. Draining her of her sap. "Rebecca what are you... Actually... I don't care just keep doing it." Rebecca switched between tit's draining as much of the addictive syrup as she can. Eventually the source runs dry and a very confused Rebecca steps away.
"Well. Moooving on then." says Krystal, completely forgetting about her own needs for a second. "That just leaves you Rebecca. We've all had our turns." The three girls turned to look at her, she was nervous to say the least. She was the only girl of the three who hadn't been transformed before, and with the other's looking at her like that she wasn't feeling confident to say the least.
Of the group, Saira stepped forward and spoke the magic phrase. "Transform or Dare Rebecca?"