As a stallion, it was too hard to get Samson aroused. All it took was a few swishes of a mare's tail and he'd be fully erect and ready to mount. Of course, that was before he was exposed to the Animalia virus. But even with his substantial increase in intelligence, his libido was still as strong as ever. Stronger even, thanks to both the virus's original design to promote fertility in animals and his shift of preferences.
Samson was still mainly attracted to mares, particularly the well-built and curvaceous mare that Abigail had become. But still, he could appreciate the beauty of the females of the other species. Though most human women and some of the smaller species were too 'narrow' for his tastes, he could still find the beauty of the larger Animalians appealing. For instance, Mary Alice now had an impressive amazonian build of muscles and curves. Not nearly as big as his own Abby, but definitely enough to get his interest. Then Sarah started suckling from her former pet's breast and started changing into an anthro husky herself, which was a bit of a turn-on for Sam. It became even more of a turn-on when Sarah kept drinking Malice's milk, increasing her age, curves, and muscles to match. The sight of Sarah growing into a husky woman and the scent of Malice's arousal enticed Sam and pretty soon, the jeans he was wearing was starting to get rather tight.
The two humanoid dogs were looking rather pleased as Sarah flexed, showing off her grown muscles. "Wait till Mom and Dad see this," she said with glee before pausing. "Wait, how am I going to show this to Mom and Dad?"
"It was still an accident," said Abby, "You tripped on a rock and land on Malice's, well, chest and got a taste of her by accident."
"And how are we to explain why we're so big and buff?" asked Sarah.
Abby paused to think this over. It was one thing to say that Sarah accidentally got infected. It was another to explain how they both matured into adults which could only happen from a second exposure to the Animalia virus.
Samson, however, provided a simple solution. "You don't need to tell them right now," said Sam, "You can keep exploring the farm if you'd like. Take some time to think over what you'll say to them."
"I am looking forward to walking around the place," said Malice.
"Yeah, I think we can have a look around before explaining this to Mom," said Sarah, "So, you guys want to come along?"
"Er, actually, we have some work to do over at the barn," said Samson.
Abby raised an eyebrow at that but didn't correct him. "I think you two can handle yourselves," said Abby.
"Ok, we'll see you guys later," said Sarah before the two husky 'sisters' walked off.
Then the two horses walked towards the barn. Considering their long legs, it didn't take so long for them to get there. "So, what's this 'work' we're gonna do?" asked Abby, her tone sounding coquettish.
"The pleasurable kind," said Sam as he stepped into a stall before pulling down the zipper of his pants. His huge stallionhood soon emerged, stiff and waiting.
Abby smirked and said, "The girls gave you quite a show, didn't they?"
"Any male would have been turned on by that," said Sam, "And this stiffness isn't going away without release. I won't be able to work with such a big distraction."
Abby sighed. Samson was a great lover, but he needed to work on his sex talk. Fortunately, he more than made up for his lack of eloquence with his physical abilities. "Well, I suppose we'll need to take care of that," she said coquettishly as she untied her shirt, revealing her well-filled bra. A quick undo of the clasp and her large breasts were hanging free. And with a pull on her pants and panties, she was ready to go.
Samson took her to the back of the stall where no one could see them. They kissed passionately as Sam gently pushed her against the wall. Abby moaned with pleasure before she let out a squeak as Samson actually lifted her off the ground. The black stallion had the strength of three strong men and was more than strong enough to lift even her considerable mass. Sam rubbed his horse cock against Abby's pussy before pushing in deep. Abby moaned as Sam filled her up before he started thrusting. Suspended as she was, Abby didn't have a lot of leverage to thrust back, but she could at least tweak her nipples as she got higher. That got a little of her milk going which soon had Samson licking at her nipples. Abby moaned even more as he gave both of her nipples a good suck, drawing out more milk. Her moans motivated Samson to plunge harder and faster into her, driving them closer to the edge. Abby grabbed the back of Sam's head and pressed her lips to his just as they both hit their climaxes. Their orgasmic cries were muffled in each other's mouths as Sam pumped a considerable amount of seed into Abby.
Sam lowered Abby back to the floor, her hooves wobbling a bit. When she got her breath back, she asked, "Ready to get back to work now?"
"Just...a minute..." said Sam, "I had to do quite a bit of...heavy lifting just now."
Abby gave him a playful punch in the arm and said, "Don't make jokes about your girlfriend's weight." The two horses chuckled before they got themselves dressed and headed back out. Sarah and Malice may be free to walk about the farm, but they had actual work to do.