Suddenly overwhelmed with lust and horniness, you rush forward, knocking the Zoolady to the ground. You motion to the other dogs, and they gradually push her onto her stomach, then tear open the seat of her pants.
Underneath, there's only a cheap thong covering her vagina. You grab that with your teeth and rip it off, then put your tongue to her exposed sex.
At first, the Zoolady resists, and tries to squirm free. But then she starts to get wet with sexual anticipation, and stops moving. Instead, she shakes her hips, which arouses you and causes your bright pink penis to grow out of its sheath. Without hesitation, you insert it into her pussy.
And damn, does it feel good inside! You begin to slowly thrust in and out, in and out. The vagina squeezes you tighter and tighter, as though it intends to force out every drop of cum you have inside.
As the mating continues, you notice something. The Zoolady's nose and mouth are starting to merge and push out, kinda like a...muzzle? And why are her ears shriveling away and her hair receding back into her head? Your dog brain is exceeding slow to put two and two together, but you still retain enough of your old human intelligence to realize what's going on: the Zoolady is turning into a dog!!!
The Zoolady knows this as well, because she suddenly barks out: "Get over here, you mutts, and get me out of these clothes! I'm ready to become one of you!"
The dogs obey her, charged forth in great numbers and using their claws and teeth to tear away her shirt, pants, socks, shoes, and underwear. Suddenly, she's as naked as all of you, her chocolate-colored skin shiny in the reflected lights of the kennel.
But all that changes quickly. Hair starts to sprout from her spores, covering her body. Loose flaps of skin emerge from the sides of her head to become her new ears. Her nose is now soft and rubbery on the end of her snout. The middle fingers on her hands melt away as her hands shrink down to paws and pads. Her legs reconfigure, and her feet become paws as well, while a tail emerges from her backside. At this moment, she is now a bitch in body, and soon, in mind.
It's at this moment that you feel your penis inflating, preventing you from pulling out of her. Soon, you feel load after load of cum pumping into her, until the inflation vanishes and your dick gradually shrinks back into its sheath.
The Zoolady, now just another dog, wags her tail happily. Soon, she will birth a healthy litter of pups for you.