Four year old force-femmed kitten getting bred by a fennekin. If it can reach the chastity key, it'll be free to return to its old life.
As soon as it gets stable enough on three limbs and tries to grab the key, the fennekin knots its virgin tailhole, accidentally unleashing an ember.
The key melting before the cat's eyes as its ass is filled with hot feral cum, forever stuck as a little caged bitch…