Leah had really long legs, that was something Eric had always admired about the kid. Her mother, an immigrant from South Sudan was of Dinka descent; which manifested in a long lean build. Her daughter, though only 11, was already stretching to match that build.
The long limbs currently swung too and fro from the side of a mini bridge overlooking a still pond. From the reflection of the pool he could see the pink underside of her bare feet against the dark of her legs.
“Yeah so I just told mum I was heading out playing with friends, she didn't ask. As long as I'm home before dark it's all good.” Leah sing-songed.
“That's cool.” Eric replied, he was happy to see her. They had planned to start meeting up midweek, after school. Meeting only once a week or so was starting to get to them as both wanted to spend more and more time with the other.
Leah had texted him and suggested the woods near their town. They were large and more importantly, secluded. Completely alone to spend time together, or so they thought.
Across the pond, a dog-sized heavily pregnant rat, once called Lisa, was washing her paws and drinking from the clear water. Shuffling up beside her came another dog-sized rat, this one dragging a pair of melon sized testicles along ground; the passage of which was lubricated by a spurting hose of rat cum spraying non-stop from a pointy red quivering rat cock; leaving a slimy trail of rat cum smeared wherever he went.
The hair trigger and unlimited cum Lisa had built into TomTom had changed the once pet rat. Weeks of living in a rat fuck nest with his mate had driven his sex-drive off the chart. Now, constantly covered in Lisa's pheromones he barely stopped cumming.
Gasping from hours of rat sex, both monstrous rodents drank deeply of the cool clear water. For weeks now both rats had been doing nothing but breeding, birthing and nursing. Lisa's rat body morphing and changing to suit her near constant pregnancy. Her rat breasts were constantly swollen and leaking milk, little mounds of hairless pink dangling from her chest; her rat pussy no longer tight, but bloomed and constantly drooling a mix of her juices and TomTom's semen.
The rat babies the bred grew rapidly inside her womb, reaching birthing size in just a week. Post birth they ravenously suckled from Lisa for just 4/5 days before they were large enough to leave the den. And large they were, to a rat they were the size of cats.
It was TomTom who was the first to smell his old master. Lisa noticing her mate sniffing the air looked up to see her once boyfriend sitting on a bridge nearby. Curious, she cocked her head, and watched him. Who was that he was with?
She shuffled over, moving some reeds out of the way, then left out a small squeak of surprise. He had a girl with him, a young girl… a very young girl…
She watched in fascination as the two intertwined, lips locking, arms caressing. Lisa quickly figured what had transpired, how her Chronivac instructions had led to this. She was sure that months ago this sight would have sent waves of revulsion and rage through her; now though, with all that had transpired, it felt kinky. Watching her former boyfriend make-out with a pubescent girl, while she was swollen full of Rat-Babies made her insides tingle.
She let out a churr and a squeak to let TomTom know she wanted his attention. He hopped to, intuiting his mate and positioned himself behind her crouching form.
He slid easily into her sopping abused rat cunt and eagerly pumped away, every second thrust or so bringing him to orgasm.
She watched the girl, now with her skirt around her waist and bare ass on show, straddle Eric's lap. His hands roamed all over her, clearly playing with her chest.
One of the girls hands was on his face, while the other snaked down between her small dark globes and began digging and playing with her ass. ‘A kinky little minx!’ Lisa thought. It looked to her, from the angle she was at, that the hand on his face then dropped to Eric's cock, trapped between them and hidden from view.
The girl worked hard then. Enthusiastically grinding against him, arm working furiously in large motions on his hidden cock, while the other hand pulled and tugged furiously at her asshole. This also seemed, to Lisa surprising. No little girl should have a rosebud that malleable.
She tried to keep her squeaking down, but needn't have worried too much with the noise Eric and his partner made, as their bumping and grinding increased pace, their mouths switching from hungrily tasting each other to gasping for air.
Lisa squeezed milk from her top teats, river of cum flowing from her, her own excitement rising.
She watched in amazement as their bumping and grinding became uncoordinated at the girl almost lost control. She fell back and the scrambled onto all fours. As Eric shuffled up behind her on his knees, Lisa gasped. He was sporting a footlong horsecock. ‘Of course he is!’ she thought, remembering he had given it to himself before Lisa had hidden the presence of the Chronivac from him. He wouldn't have any way of getting rid of it.
She felt a little bad for a moment, wondering if she should swap it back, then changed her mind as she heard the girl cry out.
“Oh Eric! Cum! Cum in my butt! Hnnnggh!”
She watched as the girl pressed back hard against a grunting Eric, horsecock pushed so hard between her cheeks Lisa thought the slim girl would split. She did no such thing however as she wiggled and ground, pushed and twisted, calling out.
“Ohmygod, ohmygod, I can feel it stretch! Yessss!!!”
With one last push she cried, “Hhhhnnnyyeeeessss!” and Lisa saw Eric's flat cock wrapped by her stretched asshole and sink in almost two inches.
Eric began to grunt, clearly cumming as the little girl cried in orgasm. Lisa gasped then, realising what was happening. There was no way a girl could take a horse cock like that. A mare could though…
Just like had happed to Lisa, constant exposure to chronivac animal cum was beginning to change the girl.
Lisa came to the thought of the girl unwittingly transforming herself into part mare.