Carlos still reeling from his sexual encounter with the mare doesn't notice his buddy slipping up behind him.
Jack leans in and gently begins to lick his herd mate's neck and shoulder with his thick equine tongue causing Carlos to wuffle with pleasure. Jack reaches around with his hoof tipped fingers and begins to massage the other were horse's nipple while with his other hand grabs his flaccid cock and begins stroking it back into action. All Carlos can do is moan with delight while arching his back and pushing his ass into Jack's crotch.
"It's time buddy for me to claim you as my little mare" Jack whispers into his ear and like a flash of lightning Carlos knew exactly what he needed to do. He gently pulled out of Jack's embrace turning around to gaze into the other stallion's dark brown eyes. He always thought Jack was good looking as a man but now as he drank in the vision of this anthro stallion standing before him he couldn't think of anything else that compared to this magnificent image of masculinity.
Without a word spoken between them they both leaned in and begun to kiss each other, probing each others muzzle with their large thick tongues, sliding them over their thick blunt teeth feeling the changes to their new equine mouths. After a time they pulled away, spit and drool dripping from their lips. Carlos smiled, turned and moving gracefully on his new equine legs crossed the tent to where boxes of MRE's where stacked. He laid his thick torso over them while splaying his legs out, arching his back giving Jack a full view of his fulsome muscular ass. Carlos raised his tail and with a wuff and a snort beckoned his buddy to join him.
Jack's brown cock began to slither out of his sheath as he stroked it into attention. As a man Jack was your'e average straight guy, sure he could appreciate a good looking guy especially if he was in great physical shape but he always had the eye for the ladies. Now after his transformation he desired more, he still wanted to fuck the mare or any female for that matter but now the thought of having gay sex with his best friend seemed awfully appealing. Looking over at Carlos with his large muscular ass, tail flagging and man that swollen black pucker he knew this is what he needed to squelch his burning needs.
He stepped up behind the stallion and as he stroked his cock precum began to spurt from his urethra landing on the butt crack of the other male. Using his free hand he smeared it over and into the pulsing black pucker causing Carlos to shiver in delight. After properly lubing his ass Jack began to push the head of his cock into his friend. Jack worried his size would be a problem but to his amazement it slide in with little resistance. Careful not to hurt his friend it being the first time he had experienced anal sex he stopped at his media ring. He then began to slowly slide in and out building up a steady rhythm. Pleasure like nothing he had ever felt washed over him like a wave but it was more than physical, something in the back of his mind telling him that he needed to dominate this male, to look out and protect him and keep him safe from harm.
Noises brought Jack out of his momentary haze. Carlos was nickering in rapture having never felt such divine physical pleasure, thinking if this is what it's like to be on the receiving end then the transformation into an anthro stallion was the best thing to ever happen to him. He could feel Jack's medial ring slapping up against his ass pucker but he needed more, he needed to feel the full depth of his friends shaft inside him. Between pants Carlos cries out "Give me more, give me all you got"! With that said Jack gladly obliged pulling almost all the way out only to ram his cock back in hilting his partner. Rutting like the animal he had become Jack fucked his partner without thought or care, it was like his mind was wiped clean and all that was left was pure animal desire.
When Jack hilted him and pushced his dick into his prostate Carlos's vision went white and all he could see was stars. He too allowed his mind to drift, focusing only on the sheer magnitude of physical pleasure he was experiencing. Surrounding them their worlds had become this soft white haze of white fog and cotton.
As Jack neared orgasm he felt a shiver run from the back of his head down to his tail and from his crotch to the end of his long shaft. Suddenly his huge balls pulled up and spurt after spurt of thick semen flowed into his mate. Moments later Carlos felt a similair feeling as his rock hard cock began to shoot copuis amounts of jism onto the sawdust floor.
They both roared with whinnies as they completed their coupling. Chests heaving with physical exertion Jack slumped over Carlos's back while Carlos finding it easy to hold his weight up with his legs they took the time to recover from their marathon fuck session. Several minutes later still with his softening cock inside his partner Jack stands up and steps away as his mind clears. Carlos finally turns his equine head to admire his friend and now mate. He straightens up and begins to stretch his body trying to work out the the knots and kinks from his muscles. Jack stands there watching, admiring his herd mates physic and thinking about the next time he can fuck this pony.
Carlos sees Jack's leering smile and says "Well that was some unexpected fun. I think I'm going to enjoy being a stallion's fucktoy, but remember the mare is still mine!" Jack wraps his muscular arms around him and says "I wouldn't have it any other way, now lets see if we can find others who would like to join our little herd". With that said Carlos presses his muzzle to Jack's thick chest and nickers a reply. Suddenly they both twitch their ears as a loud noise emanates from just outside the tent.