Saira knew it was an eventuality. She'd seen it before. So she decided to do things on her terms. She could already smell Krystal thick musk invading her nostrils. It made her so hard. Her cock had sprung completely to life now standing at about 12 inches. She grabbed Krystal's ass and slowly pushed her tip into her sopping wet vagina. As she did this the sex crazed Krystal pushed back onto it. Slamming her ass against Saira's pelvis. "Ooooooooh! Goooood! It feels sooooooo gooooood!" She was yelling and moaning. It really was quite a sight. Her nipples flared as milk spurted from them. Saira too felt the warmth of begin inside another's pussy. This was technically her first time with a penis and she was overwhelmed with the sensation. She felt so strong, so in control. The power went to her head as she grabbed Krystal's ass. She said with a slightly lower pitched growl "You'd best prepare yourself for the fucking of a lifetime!" But saira was already in heaven. All she could reply with was a series of moans and broken sentences "Nghh Ohhh Yeeees! It's in! Fuck me! I want your cum! Make me pregnant! Moooore! Moooooo!" before being reduced to a series of moo's.
Rebecca and Harriet were left on the sideline. Bewildered by the spectacle of their two their formerly human friends engaged in the most exciting mating session of their lives. All Rebecca could say was "Wow." "You got that right" Harriet replied. "You'd be amazed at what it feels like. To just complete give into one's desires, with no need to worry about the consequences." Rebecca blushed "Y-yeah I guess" She replied hesitantly. "That could have been us you know? If you'd picked something other than a tree. It'll be your turn next, to you know, change. Then you cans tart the cycle again. Maybe you change me into something with a nice big cock and we'll have some fun too?" Harriet replied with a wicked smile. Rebecca's face turned a bright shade of red. She didn't want to admit it but the idea turned her on a little. Harriet just laughed.
Suddenly Harriet's breasts began expanding. "Unnghh" She moaned. "My breasts are aching. There full of some kind of sap." Harriet cried out. Rebecca inspected the liquid flowing from her friends tits. She ran her finger over her teat, collecting a drop of fluid and licking it. "Mhmm..! It's maple sap!" She said before, like a girl possessed, she puts Harriet's boob in her mouth and begins to suckle on it. Draining her of her sap. "Oh Rebecca! You naughty girl! I like this side of you! Oooooaah" 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 looks up at Harriet. "Mhmmm thank you for that! Don't worry I won't tell anyone, I actually thought it was kind of hot." She said to a clearly embarrassed Rebecca. If it was even possible, rebecca's face turned an even brighter shade of red. She did notice however that Harriet had changed again.
Harriet had grown further in height. Her skin had hardened all over her body, severely restricting her movement. Bark had risen to just underneath her breasts. 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. She didn't look far from being a real tree.
After fucking Krystal for a solid 5 minutes Saira was ready to blow. "You want my cum you horny cow?" she yelled degradingly. "Yes! Yes! I want it! Mooooooo!" She replied back. Saira continued to thrust into Krystal, "Well here it cooooomes! MOOOOOO!" Saira cried
as she shot her load into Krystal. "Oh yes! Yes! I'm coooomoooooo!" She cried as she came hard. Her large bovine vagina milking Saira's cock for all it's worth.
The two collapsed in a puddle of sweat and sexual fluids. Exhausted from their mating. But soon enough they got off of each other, looked at one another awkwardly and then ran over to meet Harriet and Rebecca. "You've changed some more." Harriet noted. "Look you've both got hooves now. And you've grown a tail Saira." "Well I'll be damned" Saira said.
"Well. Moooving on then." says Krystal. "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?"