At the same time Mark began turning into a woman, a rat crawled out of a storm drain, pulling itself up with its front legs, and blinked feebly at the light as it emerged to gutter of the street.
Dustin had swam through a river of shit. He been mauled by another rat, and now, scratched and thoroughly humiliated, the teen in an animal's body had found a storm drain, found his way up, and now scurried down the street avoiding being seen. He could only imagine how one of the stupid old ladies in this part of town would react if they saw a big filthy rat crossing through suburbia. Fucking old bitches, Dustin snarled.
At last, avoiding a passing car - too small to be bothered with - he found himself diving into the bushes outside the neighbor across the street. To his keen joy, they were watering their front lawn. Covered in human waste and shit juice, the rat quickly ran over to the sprinkler and soaked himself, washing away the filth covering his body with flexible fingers. When that was done, and the sewer stench at last faded away, Dustin bolted back to the bushes to stare at his house.
Ty was cutting the yard. Dustin sneered in anger. He would pay, somehow. Dustin would get revenge. But not as a fucking little rat.
To his sudden shock, Dustin felt a tingle. The same tingle that had signaled his shrinkage and eventual transformation to this state, As he sat in the bushes, he looked over himself in horror. Had Ty seen him? Or sensed him? Or... or...
No! Dustin was growing! In short order, he was now a much bigger rat. Easily the size of a house cat. He gaped, twitching his whiskers, and looked at his hands in disbelief. How? How!?
And then he realized. He had done the same thing Ty had done to him. He had wanted it to happen. Willed it to happen!
He concentrated on getting bigger, and again the rat enlarged. Now up to the size of a dog, he rustled the bushes with his movement. Much too big, he realized. If somebody saw a giant rat... that would be bad. He concentrated on getting smaller, and reduced himself to his 'original' size. He needed a safe place to experiment with this newfound power. Quickly, he snuck into the neighbor's back yard and slid under the patio. He sat in the grass, with ample room to return to human size, and took a deep breath.
Human, Dustin willed. He wanted to be human.
What else? He concentrated on getting more human. He wanted to be human again. And there in the bushes Dustin watched as again he started to grow. To his delight, his back legs snapped out and he started to go bipedal. Though quite alarmingly, he was staying a rat. His animal features didn't decrease at all, but at least he was gaining back a more human shape. His heart sank as he seemed to hit his limit at three feet tall.
"Shit." Dustin cursed, sitting up and looking over himself. "Can't go all the way back." He tried again, concentrating as hard as he could, but that was as 'human' as he was getting. He tried to grow himself, at least, but that too wouldn't work. So he shifted himself back to a full rat and tried to grow again. He wanted to at least be big enough to kick Ty's scrawny faggot ass. It turned out that Dustin's biggest size as a full rat wasn't much bigger than he had been in the bushes. With annoyance, he shifted himself back to the humanoid rat and sat sulking in the grass, flicking his tail in anger.
"That fucking shit." Dustin cursed, sighing. "What did he do to me?" He looked over himself, pissed off, and snarled again. Then, suddenly, an idea hit him! He might not be able to grow over three feet, but he was also still underdeveloped from Ty's earlier wish. Concentrating again, Dustin willed his body to age to his proper size. And it did! From a scrawny pre-teen rat, Dustin grew a whole half a foot bigger and gained back his jock physique, heavy with muscle, only in rat form. "Well... at least I'm bigger." He commented. Tried to push himself older to see if he'd get bigger, but his body wouldn't go past his 'normal' size for his age.
"Hmmm..." Dustin the teen-rat stared as his flexed bicep and wondered again. He concentrated on stronger. And this time, his body obeyed. He let out a pleasured gasp as he felt all of his muscle swelling. His furry body thickened up to bodybuilder stature quickly as he hardened and inflated. When it was done, he relaxed, panting at the exertion, and blushed as he realized he had sprouted a rather long red boner.
"Huh..." He stared between his legs, but let that thought slide for the moment as his anger returned. True, he couldn't get back to his normal species. True, he couldn't grow to full size. But he could at most a three and a half foot tall muscular rat person. And with his sharp claws and strength, he figured he could still put up a good scrap against Ty.
Dustin relaxed for a moment, tested his body, crouched under the deck, and proceeded to test his transformation several times. He turned full rat, noting his muscularity stayed intact when he shifted back to humanoid. He inflated his muscle, deflated it, and eventually practiced increasing and decreasing his size several times. He then turned back to 'normal' rat form, then pressed himself to his farthest extents with every option as fast as he could. Panting, a little sweaty, he was now able to transform from full little rat to his bigger buff rat in just a second or two. Good enough.
He was hard again. The idea of slashing Ty's ugly face to shit with his claws was nice. His newly experienced shapeshifting was pretty cool too. Deciding he had time to take care of that first, Dustin proceeded to grip his big thick rat cock and jerk it off. Needed to be focused for the revenge plan. Or something. This soon turned to curiosity because it felt so different and good than normal.
Rat Dustin found he could suck himself off, which was all together an interesting and fun experience. If a little worse than being sucked off by a girl. Eventually, he polished himself off and blew his load all over the ground under the across the street neighbor's deck. Then he shifted back to full rat form, careful not to go near his own puddle of semen, and let his boner go down.
He was ready to exact ratty vengeance on Ty! And maybe get off one more time. That had been pretty nice.