Chapter 1–

Enrique winced painfully. This was the first time in his life that anything
had been put into his butt anything bigger than his own finger. And that had
only been when he had been experimenting during masturbation. No, this wasn’t
small, like a finger, this was a full-sized erect horse cock. Enrique’s two
sisters, Enez and Catalina had been tormenting him all afternoon. Ever since
that morning when they found out he had a crush on Catalina’s friend, Maria,
his life had been hell. Brazil was always a warm place for him and his family
to live, but he felt like he was on fire.

Maria was a few years older and quite a bit more mature than Enrique. She was
almost as tall at Enrique but Enrique was scared to death of her. She was
beautiful and quick witted. She definitely kept Enrique on his toes each time
she would whip through the living room of their family’s modest home. Enrique
would try to study and Maria would poke fun at him. He couldn’t stop thinking
about her.

So when he let it slip to his sister’s they immediately saw how greatly he felt
for her, and that was all they needed to make him their slave. Enrique’s
Mother was a belly rider and would be gone for days at a time with her horse.
Enrique had never known his mother in any other way. He had long ago learned
that she loved her husband as a friend and to help her produce children, but
had taken a horse as her true lover. It wasn’t common for women to do this in
his village. Most of the women who became belly riders did so without taking a
husband. Enrique’s mother wanted children and her husband wanted Enrique’s
Mother, in whatever way she would have him. She only left her saddle when she
absolutely had to. Earlier in life she had managed to spend enough time out
from under her horses to have sex with her husband. Enrique’s Dad loved his
wife more than anything and was willing to put up with her curious obsession.
She eventually bore him three children and then decided the rest of her life
was to be devoted to her true lovers. She spent every available waking moment
milking it’s huge cock with her tiny body.

Catalina had begun her belly riding classes too. She was getting to be quite
good, but had opted not join the belly riding school until following year.
That gave her plenty of time to torment her 18 year old brother after he
stupidly announced his interest in her best friend. Catalina had immediately
come up with a rather cruel punishment for trusting in her. Catalina
immediately told Enrique that she was going to tell Maria.

Entrique’s eyes widened and he pleaded with her not to. Catalina and Enez both
realized that he was theirs. They contemplated loudly what they should ask him
to do for them. Catalina got a perverse idea. She told him that her horse had
not been ridden all day and that she didn’t plan on riding him. She told
Enrique that he must ride her horse for her. Enrique didn’t think that sounded
so bad, until he realized what she meant. She meant under the horse. He
figured it wouldn’t be a big deal, they’d just strap him in, and make fun of
him for a little while and then let him go. The girls even promised that he
wouldn’t even have to take off his clothes.

Finally, worn down, Enrique agreed. Enez felt that he gave in a little too
easily but it didn’t sink in at that moment. Both girls laughed and giggled
until they finally got settled. They got him into her Catalina’s saddle. They
strapped his legs and feet in and there he swung, under a horse, with his hands
and feet bound. He pronounced that he did what they asked, now they had to
promise not to tell Maria. That’s when Catalina went into the house. Enrique
was puzzled, but felt uneasy. His sisters weren’t being especially nice to
him. Enez was poking fun at him while Catalina walked back from the house.
Enrique noticed something glinting in her hand. It was a pair of sizzors.
Enrique tried to fight against the restraints, but they were far too strong for
him to get away. Catalina returned with a smile on her face. Despite his
protests she began to cut away his clothes.

After several minutes of fighting, she finally freed him of everything but his
socks, shoes and his underwear. Enez began to undo his shoes as Catalina
asked, “Should we take his underwear too?” Enez laughed and said sure.
Enrique felt the last of his clothes finally get freed from his body. There he
was, naked and bound to a horse. “Now” said Catalina, “Time to take him inside
of you, so you can be a real belly rider.”

Enrique didn’t have a vagina. He had had plenty of opportunities to see his
mother’s and Catalina’s vagina on display as they had sex with their horses,
and he didn’t see how this would work. Catalina said, “You do have a hole, and
that’s where his penis will go.” Enrique frowned until he figured it out. His
sister intended for him to let the horse have anal sex with him. Enrique
protested, but the more he protested the more the threats increased. Finally
they said they would take him straight to Maria the way he was if he didn’t
take the horse. Enrique couldn’t imagine that, so he reluctantly agreed.

That’s when the pain started. Enrique felt his sister trying to force the
giant horse penis into his tiny anus. Enrique shouted and told her to stop.
Catalina stood up and frowned. She had an idea and ran into the house, leaving
Enrique, naked under the horse, with Enez standing over him. She snuck a peak
at his tiny penis and balls. He was obviously scared and not turned on at all,
because it was cold and without much work he could have had an inny. After
a few moments Catalina returned with something else in her hand. The large tub
of petroleum jelly would make the job much easier.

He felt his sister’s hand touch his anus tentatively, and then with a little
more force. After a few rubs she began to push a finger inside of Enrique’s
buttocks. Enrique twisted and tried to get away again, but they threatened to
go to Maria again, and he calmed down. She continued. When she was thoroughly
convinced that her little brother was completely lubed up she began to do the
same to the horse. She lubed up the stallion’s huge cock head and shaft. Then
she began to push the head against Enrique’s exposed buttocks.

After some more wincing Enrique felt the head began to push into him. It was
horribly painful, but he couldn’t imagine Maria seeing him so he went along
with it. He even pushed back just to get the pain over with. Finally the huge
horse head popped into him with a searing pain. Enrique winced and grimaced as
the huge head pushed deeper into him. Enrique couldn’t believe he had managed
to get that giant horse penis into him. He wasn’t gay and had never even
thought about having sex with another man, but a horse was different. It
seemed less wrong somehow.

Finally after a few seconds he began to relax a little. It didn’t hurt as bad
once he started to relax. Catalina stood up and smiled. “There!” She was
obviously very proud of her work. “Now let’s walk you around. My horse needs
his exercise.” Enrique didn’t like the sound of this, and the first few steps
proved to be very painful as the thick horse flesh giggled and worked back and
forth in his highly lubricated ass.

His sisters continued to poke fun at him, telling him he looked cute like that
and if Enrique didn’t start relaxing they would tell Maria. Enrique did start
relaxing. There was no way for him not to. He was dizzy from being upside
down, and the massive cock in him and the fact that he was naked was all too
much for him. Despite himself he began to have an erection. Not just any
erection, but the hardest erection he had ever had. It was painful and
throbbing and engorged with a crimson red color. The skin of his member was
shiny because it was so taught.

Enez was the first to notice. “Look, Catalina! He likes it!” The girls fell
all over themselves laughing at Enrique’s predicament. Enrique could feel his
testicles tightening. The more he fought his body’s feelings the more he was
at the horse’s mercy. The huge penis in his butt was rubbing against his
prostate and it didn’t take much to arouse him at that age. He began to shake
as he held it in as hard as he could. Even though nothing was touching his
penis, he was on the brink of an intense orgasm. His whole body tensed and
shook and before he could yell to have them stop the horse his butt flexed and
he erupted.

Streams of hot white sperm exploded from his 18 year old body. It gushed in
waves after waves, hitting the belly of the horse, and spurting all over his
chest and stomach. It was like it would never end. As if it wasn’t
embarrassing enough that he was getting extreme enjoyment from being sexually
stimulated by a horse penis, his body betrayed him again by having a very
prolonged orgasm openly in front of his own sisters. Rope after rope released
from his body, against his will. It was the most powerful orgasm he had had in
his life. His body finally began to relax, but he could still feel his anus
pulsating even a minute later.

The girls thought that was amazing and laughed as the sperm dripped off of the
horse’s belly and back onto Enrique’s already cum soaked stomach. He was a
complete mess. The girls giggled insanely. It was just too much fun, they had
to do it again. Enrique pleaded with them not to. But just like before his
sisters walked him around in circles ignoring his protests. After another ten
minutes his erection returned.

The dizzying effect of swinging under the horse made him totally loose his
sense of direction. He wondered how his sister and mother had learned to steer
the horses from underneath. He had no idea where he was anymore. His penis
seemed to be his only driving factor at this point. It was hard and it needed
affection. It was covered in sperm, and the sperm from his stomach and chest
had streamed uncomfortably around and down his sides and now dripped off of him
and dried on his naked body. The drying semen was about to get replac