Tough Cookie, I'm sure that all three of your cats will learn how to get along and play together. It just takes some cats more time to adjust to people and other animals. I think that personalities play a key role here too. I lucked out with my three cats. Storm and Sunny have very similar personalities so they get along very well and Pepper is a very easy going, laid back type of cat so he also gets along with both of them. Just be patient and everything will fall into place. Good luck.