Patric didn't notice the changes already gripping his body, he was to absorbed in Sam's mouth wrapping around his cock. The stubble growing in on Patric's face got denser until it sould easily be considered a short trimmed beard.
Patric began to squirm as Sam's tongue moves up and down his lengthening shaft. His balls began to swell, tugging down on his scrotum till they were resting on the floor looking like a pair of tennis balls. Patric's light pubes began to darken, growing out away from his cock, and down his sack. His back arches as the muscles in his body clenched up, swelling in size, his already nicely muscular frame becoming like that of a body builder. His pecs swelled out into two huge slabs of muscle, his abs tightening into a rigid six pack. His arms and legs packed on the muscle, thickly corded and hard. Patric clenched his eyes grunting as he unloaded his cum into Sam's mouth, some dribbling down and onto Patric and into the paint.
Sam stradled Patric with his hairy legs, lowering his furry ass onto Patric's cock causing him to moan. Patric rached forward, wrapping his hands around Sam's cock, yanking on it as his own was being ridden. Dark dense hair began sprouting on his legs, moving up his thighs and meeting with his pubes as they began to spread out. His arms soon followed suit, his forearms getting hairier as his pits sprouted dark dense hair. His pubes continued to spread, moving up his abs, and up to his chest, spreading across his pecs in a thick curly forest of hair, only his hard pink nipples sticking through the hair. For the second time he orgasmed, unloading his cum into Sam's ass, Sam grunted as he came, unloading loads of creamy spunk into Patric's new chest hair.
Sam pulled himself of Patric's cock which was now much bigger than it was when it went in, now 10 inches long, still hard and thick as a beer can. Sam gripped Patric's shoulders and roughly turned him over, pushing his face and chest into the paint covered canvas. Sam squeezed Patric's muscular ass, spreading the cheeks. Using the paint as lube his drove his cock deep into Patric's virgin hole, causing him to grunt loudly in pain. Sam began to buck wildly into Patric, causing the changes to go even further. Patric's thighs became even hairier as it grew up to his ass, covering his muscular cheeks in a furry pelt, growing slowly up his ass crack and bit up his back. The hair on his arms grew up his arms, more sprouting in on his shoulders. As Sam came again into Patric's ass the both collapsed down onto the canvas.
Patric was having trouble thinking, all he wanted to do was grab Sam and have more wild sex in the slippery paint, but he was soon interupted by a sharp commanding voice. His fogged brain was having trouble remembering who it was, he just knew he had to obey the voice. He got up and stood next to Sam, as the small japanese woman surveyed them. He remembered this was Ms. Trenwall, and he knew he had to obey her.
"Very good, both of you." Ms Trenwall stepped around the canvas, careful not to step in any of the paint. She nodded to herself, "Yes this will do nicely. And Patric, you will now serve me along with Sam as one of my special assistants."
Patric's mouth opened of it's own accord. "Yes, ma'am." Something in the back of Patric's mind stirred, wanting to scream this was all wrong. The voice was quickly silenced by an excitement at being able to have more hot sex with Sam.