Generally when introducing a new cats its best to get an opposite gender, less compition, so a male to your female is good, but if your cat is excepting then either would be fine. To introduce then youll want get a cage for the kitten, place it in an area where hes part of the home but not in the middle of traffic, in a closable room is best so that you can lock the others out so the kitten can have out of cage time. the first few days keep the kitten caged when the others are in the room. this will also help with littertraining if the kitten is not trained yet. then allow one to be in the room with the loose kitten, then the other, then both. this can no time at all, or a little while, depending on the attitudes of your animals. Give it at least 3 weeks before desiding whether they will get along or not, generally it take about this time for most cats/dogs to adjust. Dont leave them alone unsupervised for at least the first few days.