You follow Vicky blindly as she never told you where exactly you were headed. However in order to get your greatly anticipated "reward", you needed to at least pretend to behave like a good mare. When Vicky finally stopped you, you were surprised to find that you were once again standing on the trail you first went down when you got here. "Princess, do not move from this spot, or else..." commanded Vicky. You gave a short whinny in response, while thinking "I get it, I will be a good mare, for now. So stop with the threats. I want my reward though, so you better keep up your end too."
You no longer felt their was any reason to try and either hide or downplay your needs anymore. The fact of the matter was that you were a horny mare in heat, and the sooner you could get some kind of relief, the better. You had even stopped denying how attractive the stallions looked to you. They really were quite handsome beasts. You just hoped that perhapse one of the felt the same about you and would be willing to... and would be willing to fuck you. Yep, you now fully accepted the fact that wanted to be mounted and fucked by one of the large horsecocks. Feeling how their large balls slapped against your pussy as the pumped their hot load inside, probably impregnating you in the process.
Your daydreaming was interrupted by a sudden weight being placed on your back. Turning your head back to look, you could see Vicky hooking up a saddle onto your back. But, you no longer really cared what she did to you in this stage of her little game, you would be sure to win and finally be allowed to be bred by one of those hot and sexy stallions. "Now then Princess" Vicky said as she hopped up onto the saddle. "Now then, just do exactly as I say, and this should go by quickly."
When Vicky climbed up on you, you were concerned that her weight would be more difficult to handle bow that you were tired, but she actually was really light. So light that you almost forgot she was there for a moment. It really proved just how strong your horse body was now.
"Princess, forward."
Hearing her words, you began walking forward at a rather leisurely pace.
"Trotting, Princess. Not meandering lazily."
You picked up some speed, and were now more or less walking at a normal pace down the dirt path.
"Turn right."
What? There was no path to your right, just an open clearing. Your hesitation bought you a painful slap on your ass, which caused all of your reasoning to be tossed aside as you started turning right, walking off the dirt path and into the clearing.
"See Princess, you do not need to think at all, just do as you are ordered to. It isn't the horse that sets the path, but their rider."
You took the lesson to heart, not wanting another slap from the riding crop and just suppressed any questioning you had about her orders. Even when she told you to slowly walk into a thin tree, you did so, crushing the small tree with your weight as it was actually completely rotten inside and broke apart with almost no effort.
You were gone for about an hour, just roaming around, going wherever Vicky instructed you to. Admittedly it was kind of relaxing, not having to worry at all about where you were headed, and just going by the most recent order. It certainly went a lot smoother than before when you were learning to walk. She never made you go faster than just a normal trot too, which you were thankful for. Running would have been difficult still, but trotting was easy.
At one point in the walk, your mind had slipped into such a dazed auto-pilot state, that when Vicky orded you to stop, and then graze a bit while she made a call, you actually took and ate quite a few bites of grass before you snapped out of it. But the damage had been done, and you found that the fresh grass actually tasted really good, and that you were still hungry, so you just continued to eat the nearby grass.
When you got back to the start, Vicky ordered you to walk back to your stall once she removed all of your gear. And told you that if you managed to do so without causing any issues, then you would finally get your reward. Of course you obediently followed her command and walked yourself right back into your stall, and left your pussy facing the gate as well, hoping to quicken the time between now and sex, even if it was only by such a negligible amount. 5 minutes later, you heard a very familiar voice behind you.
"Good evening Princess. Vicky tells me that you were a very well behaved Mare today while out of your walk and asked me to personally reward you" said your girlfriend, wearing only a lab coat. When she took a step forward, you could see that between her legs, now hung a truely massive horse cock with enormous balls. "Surprised? Didn't think your ex-girlfriend secretly worked here did ya? And that's right, ex-girlfriend. But don't worry, we now have an even better relationship. You are going to be one of my mares, and I will become both your owner and your mate. Thats right I am going to be mating you, your pussy is forever mine, and mine alone. Satisfied with the upgrade in our relationship Princess?"
To be honest, you heard almost none of that. Your attention was completely on the thing you wanted the most at the moment, which was only inches away from you now. Finally you couldnt take it anymore and back up slightly, hoping to stick it inside you, but only manage to push your pussy into your former girlfriend's face. Your girlfriend who had just recieved an up close and personal invitation to your soaked cunt couldn't hold herself back anymore and began feeding her long cock deep into you, making you finally achieve your reward. Once she was in, she began fucking you as hard as she could, much to your delight. Several minutes of this passed before her hot and sticky semen was shot into your womb. Easily at least a gallon of it was emptied inside of you, much to your satisfaction. When she finished, and pulled out of you, you quickly turned around and began lapping up all of the remaining jizz still left stuck on her cock. You were completely addicted to the taste, smell, feeling, sound, even the thought of watching 2 other horses go at it turned you on now. You were just a mare now. A perverted one for certain, but still just another horse in the stalls at this point. You now lived to be fucked by your mate, or any mate for that matter. You were essentially wanting to become the slut of the barn. The mare who fucked every stallion and gave birth to at least one of their foals.
But that was only your desires. Vicky and your ex-girlfriend turned mate had a few more plans in store for you yet.