"Oh, shit this hurts so bad, it hurts so good. Bad Brutus!" Chad moaned, then he growled, "Bad Dylan! Bad Carl!" What followed was mostly unintelligible sobbing noises, but the mindchat window text was hilarious for Dylan to read. Maybe he had overdone the pleasure settings, Chad was head over heels in love with Brutus' giant cock ripping him apart. Well, the Mastiff's penis would have ripped the tiny pug's anus, except Dylan had reprogrammed the nanobots to repair and modify Chad's body to perfectly accommodate Brutus' erection, and to maximize Chad's pleasure sensations. Oh, boy it had worked too well.
Dylan chuckled he was getting hard just reading Chad's erotic thoughts. He really wanted Brutus on an emotional level, all the while his conscious mind was scream No! His subconscious was screaming YES! MORE!
Chad's brother briefly thought about blowing fourth load while watching Chad's humiliation , but he decided it would be more fun to use Chad, and Dylan had a cock identically large to Chad's former one. The nanobots would make it fit.
Dylan locked up, and headed to bed leaving the Chad headed pug, and Brutus the Mastiff knotted. He planned to be the first one in tomorrow morning.
Chad sighed. His sobs had faded to shallow breathing. He could feel Brutus' hot breath on his neck. Brutus leaned in and whispered, "Good fuck. I knew I had to have you the first time I sniffed your ass."
"Brutus? You can talk?" Chad gasped.
He turned his head to look into Brutus' brown eyes. He was shocked to see a human head on the mastiff's body.
"I can't believe you didn't want me to hump you before now. I've always loved dominating dogs by mounting them, but now that I have mounted you, bitchboy, I only want you. Guess, your master's nanobots got transferred to me while we were knotted," Brutus said, "and thanks to Dylan giving you a human head, I got one too, and I got all your memories too."
"What!" Chad shouted. Bitchboy? I'm still male! And my name is Chad! Were knotted? Brutus had unknotted before he spoke, and Chad hadn't noticed until now. He felt so empty.
"Cool, I can hear your thoughts too. You feel empty without me inside you. Heh, heh, maybe if I knot again, you will get my memories. That may make Master Brad's training less uh, painful for you, Ch-uh -ad." Brutus' now human tongue licked the nape of Chad's neck and behind his ear as he nuzzled Chad's cheek, and whispered Chad's classic pickup line, "So you want to play receiver to my quarterback?"
Chad's mind raced as he realized Brutus did have Chad's memories and could read his mi-ow! Brutus had remounted Chad. Agony and ecstasy merged. Chad happily welcomed being Brutus' bitchboy. Weird hallucinations haunted his mind. He found his memories of events where he had been with Brutus were merging. He remembered Brutus' lust and joy every time the handsome beast had tried to mount him. Karl might call himself Chad's master, but now Chad knew he could only belong to Brutus, and as the nanobots flowed back and forth between them, he knew Brutus knew it too.