Now it was Ava's turn to have erotic cat dreams, mostly of Ethan pleasuring her. Ava woke to find she was still in feline form and so was Ethan. Thanks to her dreams there was only one thing on her mind. Ava climbed between Ethan's legs and began pleasuring her boyfriend-turned-catgirlfriend with her tongue, and herself with her her fingers.
The oral sex woke up Ethan. Realizing what was happening, he just lay there and enjoy it, fondling his breasts for added pleasure. Ethan had never fantasized about being a woman, but he couldn't deny how much he enjoyed being a catgirl along with Ava.
The time slipped away for Ethan and Ava. The day was a seemingly endless cycle of cuddling, fondling, and pleasuring interspersed with catnaps and occasional snack breaks. Neither returned to human form as day turned into night. Though their pace slowed, the two catgirls kept going on and off until the next morning.
Ethan woke up to find his chest especially sensitive. Feeling himself up, Ethan found four extra nipples. He woke up Ava who was surprised by the changes and found she still only had her two breasts.
"Cats have six nipples so I guess it is some kind of extra transformation?" suggested Ava.
Ethan couldn't help but enjoy himself and Ava joined in. Soon Ethan's chest was swelling and four unmistakable breasts were joining the two that Ethan had since yesterday morning. They kept playing with the new sensitive breasts until Ethan's body shuddered with an unexpected orgasm, the strongest he had felt since his transformation.
As they cuddled again, Ava marveled how long since they had been human.
"It's been over 24 hours for you" remarked Ava "and almost as long for me."
"I could get used to this" replied Ethan.
Ava decided to find the card from the transformation calendar to see if there was any additional information. It took some searching, during which Ava noticed her chest was also becoming more sensitive. Sure enough she had four extra nipples now as well, with the extra breasts sure to follow. Finding the card, she looked it over for fine print.
She found the text she had read after her first transformation:
"Consequence clause: The model posed for the recipient for his or her enjoyment. If the model does not supply the calendar, the model will take the form posed as for the calendar month when aroused."
Then she noticed a second sentence she had failed to read, or which had not originally been there. "If the model remains aroused for more than 24 hours, further transformation will occur then the form will be permanent."
Ava reread the text, her eyes growing wide as she realized what had just happened to Ethan. She had been in feline form almost as long as Ethan, which meant her change would soon be permanent as well. Before she could say anything, Ethan walked up behind her and wrapped his arms around her. Finding her growing extra breasts, Ethan fondled them and Ava let out a sigh, part exasperation and part pleasure. The card fluttered to the floor, additional text unread that they had already learned the hard way: "Warning: if the model bites anyone while transformed, their form will be passed along."
Ava's head swirled from Ethan's touch and she found herself instinctively caressing her other new pair of breasts. She could feel an orgasm building.
"Ethan...ugh...the change...ugh...is...ugh...permanent..."
"I know" she whispered back.
Ava let out a loud caterwaul of pleasure and only Ethan holding her up stopped Ava from collapsing to the floor when the orgasm signifying her permanent transformation hit. Ethan carried her the short distance to the bed.