As the door cracked open Cameron and Ava walked in. Cameron began to speak before looking up at his naked friends fumbling to mask their perverse act "Guys this is..." he stopped as he looked up and James' massive dripping donkey cock, meanwhile Ava's zebra cock immediately grew erecte twitching at the site of Will's lion pussy the smell of the heat making her nostrils flare. In the wild this would be her natural predator, but she would be the one to take him.
Cameron's tongue began to poke out as he smelled the scents of sex and began to massage his cock through his pants, as it began to recede his balls pushing inside of him to form ovaries, as his dick began to form his new vaginal opening, his, now her clit. She was now fully what she had spoken to life, a bitch, and one in heat began to set in as she looked at her fellow four legged friend her tail wagging her new sex growing slick with need. It wasn't an unprecipitated feeling after James searched for Cameron all day his cock still slick with Will's juices was ready to breed this new slick cunt.
Cameron licked her lips as she approached and positioned herself in front of her friend. her forearms lowering her and her large ass and tail raising for her new entrance James' didn't take a beat, his for legs falling over her as he began to thrust and probe for entrance. "Fuck Cameron, I looked for you all day I need you!" Cameron panted eagerly as James' sought his mark. Meanwhile Will made his way to his friend's pretty mouth and mounted Cameron from the front seeking refuge for his lion cock in her panting mouth. His own pussy still in heat, Ava began to circle Will and grabbed his hips eagerly. Will shuddered at her grasp ready to be claimed as he face fucked Cameron.
With a bray James plunged into Cameron's new tunnel stretching it to it's limits with his massive donkey member and began his rut "Fuck Cam, you're so tight... You're- mine!" Cameron only grew wetter as she found himself spit roast between her two friends her breasts swaying beneath her with each thrust. With the additional power of Ava's thrusts into Will adding to the force, Will's cock pushing to the back of his throat. A second change from the oral began with Cameron as he nose became wet, and dark, a true bitch's nose, a similar change to what James' was experiencing as his nostrils flared and widened taking in the smell of sex.
As Will thrust into Cameron propelled by Ava his feet started to become clawed and paw like, like a true lions. And Ava, the least changed of the group who's only changes had been the addition of a cock and her ears experienced the growth of a tasseled tail not so dissimilar to the one swishing behind James as he bred Cameron.
"Fuckkkkkk MEEEE HAWW HE HAWW" James brayed as his massive donkey balls unleashed a huge load of cum deep into Cameron's new womb, who was overcome by her first feminine orgasm as her whole body shook- she couldn't help but picture carrying a litter of puppies. On the other side of the foursome, Ava unloaded into Will who shuddered and purred, in turn cumming down Cameron's throat- their newest changes were permeant.
As the horny feelings began to subside in the group, James and Will pulled out of Cameron with a plop, and Ava pulled out of Will her big zebra cock being to recede back into it's sheath. Cameron licked a little bit of Will's cum off of his lip feeling a bit embarrassed and conflicting feelings now that he was fully a female, and gestured up "... So guys- this is Ava..."