Uncle Hank helped you get down to the centaurs' barn. It was difficult due to your hooves occasionally sliding out from under you on the dirt path.
He gently led you into one of the stalls. He placed you into what seemed like a sex swing made for centaurs. He had you lean forward and grip the handles hanging from the ceiling. "I'll go get one of the stallions. I'll be right back," Uncle Hank said.
You felt your dick get harder and started to buck the air in a vain attempt to relieve the pressure. After what felt like hours, Uncle Hank returned with Grayson. He was a large draft horse with even bigger muscles. He had bushy brown hair and an equally bushy beard that looked like had a glorious mane that mixed in with his chest hair.
"You didn't tell me that he was at this stage. You should have told one of us sooner."
"I'm sorry, Gray. I didn't know until now."
" I'll take care of it. You might want to give us some privacy," he said with a wink.
"Please, help me..." You moaned as Uncle Hank left.
"Listen Buck: this is going to get a bit rough til it gets better. If you came to one of us sooner, it wouldn't have been as painfy. Anyway, just focus on enjoying the ride as much as you can" he said as he squeezed your right pec.
You felt Grayson's hands on your butt. He messaged them for a moment and then the next thing you knew his hands gripped part of the straps above you and his hooves were on the strap under you. You felt his dick on your ass.
"Take a deep breath, Buck. The pain will only last a minute." You felt yourself inhale loudly and as you started to exhale you screamed due to his dick being inside you. He stayed still for a minute, letting your body adust to his dick. He then started to hump you. He was gentle and slow at first for several minutes. It was painful at first, like his dick was ripping your body apart. And then it felt like a light switch flipped and it began to feel good. You started to
"You're doing great, Buck," he said lovingly. "How about we go a bit faster?" He started to hammer into you at a faster pace. All you could do was moan in pleasure. You then felt Grayson's strong arms around your body and his hands on your pecs. Shortly after, you both roared in pleasure with Grayson panting onto your ear as you both enjoyed the afterglow together.
You finally opened your eyes. Grayson nuzzled your neck. "You've turned into a fine stallion Buck. You couldn't believe what you saw: you had a faint five o'clock shadow on your face with your long hair flowing down your back. Your chest looked like you had exploded with muscle and your biceps looked like baseballs. You horse half was a Polimino. "Welcome to the tribe, Buck" he said as he kissed you.