...Sam started with just going in and out a few inches but slowly got faster and deeper. The combination of pain and pleasure was something completely new to Max and she had no idea if she liked it, but one things for sure, the pain seemed to be going away and the pleasure was increasing with each pump. Max closed her eyes and just let herself drown in the pleasure, moaning with each motion.
She didn’t know how long she had been lying there before she noticed something was off. Most notable of which was Sam’s balls slapping against her with each thrust. That and her breasts were getting heavier. She opened her eyes and looked down, her breasts had grown to nice round furry E mounds. She pulled her breasts aside with her fur covered hands and looked down to see a nice big fur covered mare pussy filled to the hilt with Sam’s penis.
It took a moment for it to sink in through her haze of pleasure before she realized what was happening, and that she wasn’t wearing her horse suit. “SAM? SAM! Stop, something’s happening to me! SAM?” But Sam was oblivious, deep in the throws of pleasure and hormones.
Max rolled over onto his hands and hoofs and tried to pull out from under Sam, but Sam was too powerful and Max couldn’t budge, all she could do was stand there being pounded from behind by her girlfriend’s long member. She could feel every thrust travel from her pussy lips to just behind her swinging breasts. It was all too much for Max, the sensation of Sam’s meaty penis pushing into her, the slap of large furry balls against her thickening thighs, and her own mare juices running down the back of her legs. “I’m cumming!” Moaned Max as her sensitive pussy walls contracted again and again around Sam’s shaft, sending him over the edge.
Sam let out a low horse nicker, his penis stiffed and swelled as thick cum flowed down his shaft and exploded into Max. He continued to pound her as he shot load after load into her, pushing it deep with each thrust.
Max felt Sam’s shaft stiffen and screamed in pleasure, taking every inch of his hard shaft. Sam’s cum flooded into her, filling her womb. Then he pulled back to thrust once more into her, pushing his seed into every fold of her insides, continuing to pound her full of cum for a full minute until finally he was empty.
Sam sagged on top of his mate’s back and horse rump, panting from his exertion for a while. His horse penis slowly retracted and eventually he pulled out, excess cum dribbling down his mate’s legs.
“That was amazing, Max!” Sam said as he slid off her back. Then his eyes went wide with shock at the sight of her. Max was now covered in horse fur, her back legs were now like a horse’s, and her pussy was that of a mare’s with a puckered ass and short tail above it. Max rolled over onto her back still basking afterglow, and Sam saw two gorgeous fur covered F sized breasts on her chest. Her stomach was visibly bulging from all the cum. She almost looked like a smaller version of her horse suit from the neck down.
“Max, are you alright?!”
“Ya, I’m fine..” Max replied dreamily.
“Max, no your not fine, your turning into a horse!”