Your little brother's massive mottled equine cock was once again fully extended from its sheathe, and you watched as it wobbled heavily around as you gargled on its fat sweaty stallion nuts.
"Mmmmm Ben, I'm about ready to go again," Tommy announced, smiling widely down at you as you looked like a chipmunk with each cheek filled with testicle.
"GLHKAGLCK," you attempted to reply.
Tommy laughed and lifted up, popping his huge nads out of your mouth. A long string of saliva connected your mouth to his right nut.
"What was that?" your half-horse brother asked with a grin.
"I said it's my turn now, bro."
"Ohhhhh, okay. I guess you can have a go. You haven't been able to take your eyes off my fat horse ass since you walked in here, haha."
Tommy walked over to the foot of the bed and spread his asscheeks toward you, lifting his tail out of the way to reveal his swollen black sweaty pucker. "If you think you can handle it," he added teasingly.
You, however, had another change in mind first. You focused on your brother and decided to make him a complete centaur. You were then met with a peculiar sight as his change took shape.
Tommy's legs remained in the same spot, but his big furry butt extended toward you. The new flesh behind it rounded out and expanded to fill up the new space. A couple of nubs began growing from the bottom of his meaty cheeks, quickly taking shape as a new pair of horse legs. The flesh between his front legs and rear soon finalized as the typical barrel shape of a horse's midriff, and Tommy's poor bed groaned as it struggled with the increased weight.
Your little brother's morph was complete, now with a young pony's body beneath his waist. His gorgeous flowing tail swished left to right as he looked back at you expectantly.
"Well? You gonna fuck me or are you just gonna admire?" He teased, smirking. He knew he had the goods.
You smiled back and stroked your rockhard average dick a few times as you stepped up to his pert musky rear.
Again, Tommy shifted his tail out of the way, allowing you to gaze into his huge twitching equine sphincter. It appears it grew even larger as a result of your morph.
Your centaur sibling deserved better than some meager human penis, you decided.
Pressing the head of your cock against his engorged entrance, you thrust forward and immediately your entire cock sunk into Tommy's cavernous ass.
"Ahhhhhh," you sighed from the pleasing sensation. However, you weren't finished yet. You focused on yourself, and initiated yet another morph.
In an instant, your upper body started traveling toward your brother's torso, your own legs remaining behind as your cock stayed buried to the hilt in his sweaty stallion butt.
Like with Tommy before, two nubs started growing from your stomach. At the same time, a shiny coat of grey fur began to cover your warping lower body. You felt your feet crack and crunch painlessly as they soon shifted into big black hooves. Your legs thinned and your ass expanded, a long black tail sprouting from your tailbone. Your new front legs finalized just as your asshole finished growing large enough to take horsecock easily, however with your previous morph you could probably take two or three without issue.
Lastly, you couldn't help but moan as you felt your genitals change. Tommy moaned as well as your cock lengthened and expanded inside him, reaching new depths as it brushed past his enlarged horse prostate. Your balls sunk lower and lower as they swelled with equine seed, the taut sweaty flesh turning the same black as your wide deep asshole.
Finally the change was finished. Your entire hulking horse body rested weightily atop your little brother's, mounted with your entire two-foot meatcannon buried inside him. Your lower body was considerably larger than Tommy's, as you possessed an adult stallion's form, whereas your brother's was that of a maturing young foal.
Your belly was now pressed up against Tommy's back from behind as you towered over him, and you reached your arms down and caressed his chest as you began to pull your enormous stallion cock out.
Once about a foot had exited him, you thrust back forward until your giant balls slapped loudly against Tommy's.
"Oh Ben, you're so big!" Tommy groaned. He looked up at you and you saw how his eyes were glazed with lust.
You smiled sweetly in return and leaned down to meet your lips with his.
The two of you let out muffled moans as you fucked your kid brother. Tommy had brought his own hands up and started caressing your arms as you held him from behind.
Your giant tool pumped in and out of his hot wet asshole, lubed up by the pre that gushed from your piss-slit. The room filled with the SCHLORPs of your fuckstick, the slaps of your balls against your brother's, and the smell of sweaty steamy bestial sex.
After several minutes, you could feel your fat nuts tightening up. You were reaching the edge of orgasm, your first as a centaur. You could tell by Tommy's moans that he was getting close too. In fact, you were surprised he hadn't blown his load already with how much he was enjoying getting fucked by you.
You finally broke your kiss with Tommy to let him know the news.
"I'm about to fill you with so much cum, Tommy," you said around pants, continuing to pound his fat wobbly ass for all it's worth.
"Please hold on Ben, please make it last," your little brother begged. "I love feeling you inside me. Just a little longer!"
You smiled at him, "I can't stop it from happening, Tommy, but we can always go again, okay?"
"Ah! Ah! Alright...," he conceded, enthralled by the battering of your nuts against his own. "Do it then, Benny. Fill me to the brim."
Hearing your brother talk to you like that sent you over the edge. You used all your stallion power to thrust into him one last time, completely hilting your massive tool in his guts and sending your balls slamming into Tommy's at Mach-5.
"Oh Tommy, yes!" you cried out as your nuts released their load. Gallons of yellowish horse spooge exploded into your brother, who simultaneously began firing his own massive ropes of smelly equine semen onto his bed.
Your shared orgasm lasted minutes. Your balls wouldn't stop pumping Tommy full of their bounty, continuing even once Tommy's climax had abated.
"Ughhhhhhh, it's so much!" Tommy groaned, reveling the warmth and weight of your cum filling his insides. "I wish you could cum in me forever!"
That could be arranged, you thought with a smirk, but decided to save that for later.
You sighed heavily and relaxed your entire weight onto your little brother as your orgasm finally came to an end. Your brother's smaller pony-sized form was surprisingly able to handle you essentially laying atop him.
In an instant, you were once again making out with Tommy, groping and massaging his slim boyish chest as your tongues wrestled.
You then heard Tommy's door creak open.
You broke the kiss and looked up to see your mom enter the room, holding an empty laundry basket. She smiled at the two of you before heading over to Tommy's dirty clothes hamper.
"Morning, boys," she greeted. "Don't mind me, I'm just getting Tommy's laundry." She dumped the contents of the hamper into the basket, revealing nothing but shirts. Understandable, considering her youngest's new form. "You boys just finish?"
"Yeah!" Tommy said excitedly, "Ben just completely filled me with his cum!"
Your mom smiled widely at the news, "Good! I'm glad. Well, don't let me interrupt, I'll let you two love-ponies get back to it."
She chuckled and started heading back to Tommy's door.
You focused on her and instantly her ass exploded out of her yoga pants. Your mom grew three feet taller in height as her new centaur body took shape. Her new legs grew out along with a long blonde tail that matched her hair color as her massive additions were soon covered in a brown and white blotchy coat, making her an American Paint horse centaur.
A truly gigantic set of mottled stallion genitals flopped down between her hind-legs. They were even larger than your own, and her 2.5-foot meaty schlong was fully extended, a dribble of pony-pre leaking from its tip as she clopped to Tommy's door. Her bowling-ball-sized foal-factories swung heavily between her knobby horse knees.
Your mom was now a shemale centaur, still gorgeous and MILF-y from the waist up, but she was allllllllllllll stallion from the waist down.
Your softening meatstick started regaining rigidity at this sight, making you and Tommy moan as it started traveling back into your brother's rectum.
Perhaps you could get your mom involved somehow, or even your whole family.
What should you do next?
View Portfolio
Visit Notebook
Send Gift Points
Awards
Badges
Send Email
Community Newsfeed
General Discussion
Sponsored Items
Book of Trinkets
Static Items
Books
Groups
Interactive Stories
Audio
Campfire Creatives
Community Notes
Crossword Puzzles
Documents
Folders
Images
In & Outs
Madlibs
Photo Albums
Polls
Product Reviews
Quizzes
Survey Forms
Web Pages
Word Searches
More by this author
