It felt wrong to have his master's friend kneeling in front of him, but the intensely pleasurable sensations Xander produced with his attention to Rex's straining cock kept him from thinking too much on that mild disturbance.
He had been unsure how to respond, at first, but now as Xander kept going with the pre-dinner blow job scattered phrases leapt to mind. "Good, boy," Rex growled in a raspy voice. He looked down and met Xander's uplifted eyes, which sparkled with delight. "Keep going, bitch," Rex growled, not even thinking twice about the fact that Xander was a far cry from a female dog.
To his disappointment, Xander's hot mouth slid off his wet cock. Rex felt puzzled, but then Xander crawled onto his lap. "I want to give it up to you, daddy," the naked Latino guy said in a soothing purr.
Xander deftly positioned himself and helped Rex slide his achingly hard cock inside him.
"Fuck, bitch!" Rex exclaimed, using the words that sprang to mind that seemed to energize Xander's gyrations.
Down a few blocks, Rex's former master found himself shunted aside so his new canine body could act upon its instincts regarding the bitch in heat so agonizingly out of reach behind a chain link fence. His penis fully emerged from its furry sheath, Frank paced like a canine robot along the length of the fence, his canine urges screaming at him to get to her while his human mind made a feeble attempt at resistance. Every time he came close to asserting himself, a wave of sensation swept away his resistance. The sensations, strange echoes from the human part of his mind left inside his former human form, synched with the progress the new Frank made as he fucked Xander's bubble butt.
Frank stood on his four paws outside the fence. He stayed rooted to the spot, as if petrified by the overwhelming pheromones from the female dog on the other side of the fence. He closed his eyes, but the scent filled his nostrils and drove him to search out weak spots. He found one, a large hole partly dug in a corner of the fence hidden from view by the branches of a large shrub. Frank nearly howled when he saw the hole was too small to squeeze through to the other side.
Necessity being the mother of invention, however, he began digging. The curious female dog came over and watched him dig, giving excited yelps from time to time as if to encourage him. He soon widened the hole and pushed through. He had to wiggle and contort, but Frank managed to push and pull himself through the opening. As he emerged from the hole, his collar snagged on one of the shrub's extensive roots that had been uncovered during Frank's excavation. He whimpered at feeling restrained, tugged hard, and felt the pop as the collar snapped open.
He didn't care. Leaving behind the collar, Frank surged forward. The object of his affection proved a bit of a tease, but she eventually settled down and seemed pleased to let Frank mount her.
For Frank, the relief was like the lifting of an immense weight. He buried his cock into the receptive female, the first time he had had sex with a female since some bumbling efforts in high school. He huffed and panted, and all too soon felt the inflation of the knot and the release of all-that pent-up energy.
"Hey! Get off Daisy!" An angry man spoke loudly. "Where the hell did you come from?"
Embarrassment leaked into Frank's dim thoughts as he managed to regain weak control over his new canine form. He started to flee the scene only to feel a tug that kept him in his two-legged stance over Daisy's lower back. A biological prisoner, Frank could only whimper from shame and alarm.
The angry man marched toward the locked dogs, removed the collar from Daisy's neck and, grabbing the scruff of Frank's neck to provide unnecessary control, he fastened the collar around Frank to replace the one he had lost.
The man stabbed in 9-1-1 on his phone only to get a lecture. "I'm telling you this is an emergency," he protested. "Caught this damn dog screwing with my Daisy and I want you to send someone from human services to pick him up."
Although the exasperated dispatcher told him he wanted the humane services, not human service, the guy remained stubborn. "Well, what's their number?" To get rid of him, the dispatcher gave him the number and disconnected the call.
"Stuck-up college kid," the man said as he heard the call end.
He then dialed the number that got him connected to the city's animal control division. With Frank listening with increasing concern, the man related his discovery in his yard. "No, he don't have no collar or tags, but I got him fastened up waiting for you," he said.
Frank barked. "Listen, this is a mistake. I'm not a dog!"
"Shut the fuck up!" The man shouted at him.
Frank whimpered and obeyed.
The man gave out his address. "Just get here and get this mutt off my hands!"
Back at Frank's former home, Rex in Frank's human body looked quite sated as he leaned back on the cushions with Xander's arms draped over his shoulders. Sticky skin detached as Xander kissed him again and got to his feet. "You want to shower before dinner?" Xander asked. "It won't hurt to let it simmer longer."
"Sure," Rex said, still trying to catch his breath and collect his thoughts.
"Don't keep me waiting you big beast," Xander said.
"Be right with you," Rex said and watched the nude Latino leave the room. He had just fucked his master's friend, and he'd loved every minute of it!