Surprisingly, Liz made Maddi cum extremely quickly. She asked to go first, and in just 30 seconds, had Alex pumping out his seed all over the ground and his tits. "How!" Cried Amanda. She didn't even start to watch, yet, having gone to a near by drinking fountain for a sip of water.
"It was easy, I stuck my entire fist up their ass and massaged Alex's prostate." Said Liz nonchalantly, as if it was the most normal thing to say. Amanda shivered from the thought of being anally fisted and having the soon to be her's prostate massaged, causing her to orgasm that quickly.
The swap was quick. Amanda and Alex lost vision for only about 2 seconds before regaining it, now in each other's bodies. The only difference was now Amanda's body had even larger boobs, and Alex's body had a few sizez smaller. Which, due to their reduced size, were no longer able to hold the horsecock quite as nicely as before in between them.
Alex now examines her new body. She more or less looks like Amanda, save for her pair of EE cup boobs, each topped with a 3 inch long teat, and full of milk. And the new mare pussy which replaced Amanda's body's human one.
"Alex, or rather, Alexis, seeing as you now have a fully female body. Come over here and let me fuck you." Demanded Maddi.
Alexis found that the thought of being fucked by Amanda's horsecock made her mare pussy flare up, becomming hot, as it begin lubricating itself excessively, causing a steady dripping of a clear gooy liquid to ooze out of it and down her legs. She wanted it inside of her, badly. And didn't hesitate to drop down on all fours and walk underneath them. She made sure that her mare pussy was lining up perfectly, as she let out a small stream of urine, indicating that she was ready for breeding.
The scent of the urine reached Maddi's nose quickly, and sent her into a mating frenzy, thrusting her horsecock into the horny mare in heat beneath her. Amanda, having no control or say in the matter, simply just enjoied the performance as she felt her horsecock become enveloped by Alexis' sopping wet pussy. She could feel her balls slapping against her former ass too, and it turned her on even more. Finally she couldn't take it any longer and let over a gallon of her sticky horse cum get pumped into Alexis, who shockingly was able to keep it all inside of her, not letting even a single drop spill out onto the ground.
Once she finished stuffing Alexis full of cum, Maddi unmounted her and backed off a bit, regaining her senses. Alexis crawled a few steps forward, helping to slide the horsecock out of her satisfied pussy. She was inexplicably happy for some reason, and as she felt her cum baby slosh around in her swollen abdomen, the thought of birthing out a foal entered her mind. Wait didn't this mean that she now pregnant with a horse? She had all the right parts, and just was pumped full of thick, warm, amazing horse jizz. Alexis began to fantasize about horse cum of all things, and the fact that she now found it to be her favorite thing in the whole entire world didn't help.
Liz was watching their fun from a nearby restroom, having used it to wash amd clean up her arm. She cupped her messily small chest, as her envy continued to grow more and more from watching Alexis's EE cups swing about while she was getting fucked. She decided to rejoin up with her friends and try to win a bet which would bring her up to a more comparable size.
Alexis finally manages to regain her strength in her legs and pushes herself back up onto her feet. Standing on her 2 legs is no longer as easy of a task with her new, pregnant looking body. She was so forward heavy, that she had to lean herself backwards a bit just to balance herself out. "Alright now for the next bet. Let's see who can stand on only half their amount of legs the longest without falling."
"That sounds interesting, and can we make the bet increase my cup size somehow? I am feeling a bit left out." Agreed Liz.
"How about winner gets a pair of DD cups again, second place gets an identical pair of their own boobs mirrored on their back, and third place gets another boob inbetween her origional pair while all 3 of them gain 2 cup sizes?" Suggested Maddi, to which they all agreed.