All I can say is awwwwwwwwwwww. They are both so cute. I'm glad that they are getting along so well. As far as the litterbox goes, Storm will cover up Pepper's or Sunny's mess. Sunny is the worst about covering up. Someone told me that the mother cat teaches the babies how to use the litterbox. I don't know if this is true or not but that would explain Pepper and Sunny's problem because they were found without any mother.