The two of you began to kiss passionately, fumbling with your clothes which were soon scattered on the floor. When you were both finally naked you pushed her onto the bed and climbed on top her. After more furious kissing and groping you began to kiss your way down her neck and chest when suddenly you realized the two of you weren't alone.
Your kitten Jade must have snuck in the bedroom door just before it closed. Now she had jumped on the bed and was eying the two of you with curiosity.
"I don't care anymore if she watches" said Fall. "Fuck me already!"
"I think she wants something. I wish Jade would get her wish."
Jade let out a surprised meow. You watched in amazement has her body began to grow. At first you thought she just wanted to be a big kitty but then further changes began. As she grew well past the size of any housecat her arms, legs, and face began to take on a decidedly human shape, but her body retained many of her feline features. Her tail and ears grew with her. Three pairs of human-sized breasts formed on her chest. Finally she was the size of a human and her changes seemed to stop.
"Holy shit" muttered Fall. You said nothing, but certainly agreed.
Your kitten had turned into a green-eyed catgirl.
"Jade?" you asked, having trouble believing it.
"Jade is all growed up now" she purred. "Jade's humans smelled so delicious, but they pay little attention to Jade when she is a kitty. Jade wanted form her humans would desire."
"Desire?" you ask. She's certainly a very sexy catgirl, right out of your fantasies, or Fall's. But...
"But we're like your parents!" exclaimed Fall.
"Silly humans. Jade has no seen her mommy since she was very little. You are my humans, but not my parents. And Jade may have been small, but Jade is of breeding age and old enough to choose her mate."