"Slowly turn into a Cow! Your going to start with your tail. When the transformation is complete you will still have the ability to speak, although you will be mooing alot too. Oh yeah, and your in heat. So have fun with that."
Before Krystal had time to react the changes took over her body. She immediately fell upon all fours raising her ass up in the air, while the front half of her body was lower on the ground. Her head was thrust backwards in the air, in pleasure as suddenly a small lump began to form on her tail bone. The lump began to grow and grow, stretching the limit's of her underwear. Soon her panties snapped and the tail flew through gaining length and mass rapidly. Krystal was instinctively bucking her hips in the air with each step of the transformation almost instinctively. She began panting and moaning rather loudly, "Ugh, Unh". Sweat dripped from her forehead and her nostrils flared. Her body was on fire and she felt amazing. "Should I really be feeling this good?" She thought before her mind was once again lost to the sensations of her change.
Eventually her tail had grown in completely, gaining considerable length, with the end reaching just below her knees. In the final throws of her transformation she let out a loud "Moooooo!" Falling to her knees she looked up at Rebecca, Saira and Harriet and blushed madly.
"No need to be embarrassed!" Saira said. "Your not the only one who's going to be going through this tonight, just relax and enjoy it."
"You know something. Your right!" Krystal said, taking to her feet once more. She swished her new tail around testing it's dexterity. She found she had surprisingly good control over it. 'I'm not the only one. And with that in mind Saira, Transform or Dare?"
But before Saira could answer a loud moan was heard. Saira, Krystal and Rebecca all turned to Harriet whose transformation had begun to progress further. Without her noticing rope like vines had wound there way up her legs and had just entered her pussy and ass. "Ugh... what's happening to me?!" she cried out in between moans of pleasure. Suddenly a small mass appeared at the bottom of the vines, it began to rise up, pumping into Harriet's orifices'. As the first set of lumps disappeared into her she let out another wail.
"The vines are pumping more nutrients from the soil into your body to fuel the transformation" Saira said. "At least that's what we thought when it happened last time."
"The pleasure... It's like... An orgasm.. Agghhh! I can feel them... inside me..." Harriet screamed as another set went into her. "How long... Ugh... does this last?"
"Oh not too long. Just another couple of minut..." Before she ould finish Harriet cut her off "MINUTES?!" She screamed again, as more nutrients were soaked up into her body.
The three girls just stood there and watched as Harriet changes continued. Eventually the vines had gained enough energy from the soil and they began to break away, revealing that underneath them, Harriet's legs had fused together and were now covered in bark. The bark made it's way up to her waist stopping just above her ass. She had also risen noticeably and a few small green leaves sprouted randomly over her body, just below her neck.
"How you feeling?" Rebecca asked?
"Stiff, and a strange mixture of fatigue and energized. But otherwise alright. Just carry on, i'll be fine."
Saira smiled back at Krystal. "All right then, where were we? Oh yeah you just asked me... Crap." The smile suddenly dropped from her face. "I guess that means I get both. Thank's Harriet your timing was impeccable."
"Hey don't blame me!" Harriet replied with a smirk.
"Well then Krystal, what will you choose?" Saira said with a sigh.