Though their dad made them change themselves after they turned eight, the two kits still had a longing to change each other. By the time the two learned about the tip of the secrets their neighbors had, Melanie managed to finally sneak in and start changing Charlie again. She was a the big sister after all and it was her duty to take care of her sometimes forgetful brother just as she wanted him to change her.
Later that evening, partially to asage a jealous sister, Charlie decided to do something feral in nature; marking Melanie as his. They weren't ready to really go for it so Charlie decided to press his diaper up to hers and warmly wet it, letting Melanie feel the padding getting warm. To him, it was a good way to start as the two liked the experience.
However, Charlie will learn that Melanie is very, very jealous when it comes to Charlie and maybe the two will have to come to a bit of an understanding...
