Jeff fumed all the way home, and mulled over how to get back at Matthew for humiliating his little brother (and himself). He could swap his little brother's dick onto Matthew but it was kind of a gamble... Matthew could have an even tinier prick than Jacob.
It was only when they finally got back and his dog jumped up to greet him did he realize what he had to do. His dog Milo was a large mutt of some kind that looked kinda like a husky. He also had a large bobbing dick. Jeff grinned evilly and set to work.
"Hey, Jacob, listen I have a little bit of work to do so I'll see you later, okay?" Jeff said as he left to go upstairs.
"Yeah, sure thing, bro..." Jacob said dejectedly. He was happy that Jeff wasn't asking for his old large dick back but still feeling upset about earlier.
Jeff quietly got the Chronivac out and set to work. He wasn't really sure how or if this would work considering the range of the device but shrugged. Soon he had all the options punched in and made sure his dog Milo was nearby. He set the transformation to begin in just under a minute (just like before) and awaited the results.
Milo was rolling around on his back, begging for a belly rub from Jeff, but suddenly rolled onto his side and pinned his ears down. Milo started to whimper and lick at his balls.
Jeff watched in amazement as Milo's dick emerged from its sheath and start to change shape and color. Milo had a hefty dick, a full 6 inches, but it immediately began to shrink. The furry sheath at the base stretched up as it lost all semblance of hair - Matthew was uncut apparently. Finally, Milo's balls twisted and shook as the shed hair and descended.
The transformation was complete, Milo now had a 4.5 inch human dick laying limply under his belly. He whimpered and licked at it helplessly, before turning his gaze to Jeff.
"Aw, it's alright boy, you'll get used to it." Jeff said giving him a quick pat, "I don't know how long I'll leave you like this. I just wanted to get back at Matthew. Go crazy with it, though, boy. I want you banging every bitch in the neighborhood."
Milo opened his mouth in a doggy grin and started to pant, Jeff let him out and then went to see his little brother. He was overdue on getting his old dick back.
Jeff only found a hastily scrawled note on Jacob's bedroom door.
"Going out on the town tonight with friends. Please, please, please let me borrow your dick for a little while longer! I want to get laid!"
Jeff chuckled. He decided to let his little brother enjoy his cock a little longer. Actually, the idea of his brother plowing someone else using his dick was kinky enough to get Jeff's new little prick hard as nails again. He pulled out his waistband and looked at the small cock straining against his underwear and grinned.
"I actually kinda like having you..." He said before pumping at it once again.