All I can honestly say is.. YIKES! I should tell you a story. MY cat is very much like yours. She is a social queen, and I hade her for almost ten years now. If your cat is female, by this time you owned her she expects to be the queen of the house (Pampered, all attention on her, she doesnt need more little kittens). If it is a male, he expects to be the kind. (All attention on HIM, and no little kittens to clog his royalty). What you need to do is think about this, I have had bad experiences. Take gradual, gradual steps to letting your cat meet the kitten you choose. Here are some steps..
1) Rub the kitten with a washcloth THOROUGHLY, then lay the washcloth in the middle of a room your cat goes in often. Dont let your cat see the kitten, and dont touch the washcloth other than putting it in the living room. Let your cat get used to the scent of another cat.
2) Have a neighboor, NOT I repeat NOT you hold the kitten and come in the same room as the cat. While this happens, you should be comforting your own cat. If you hold the kitten, the cat will get the impression its misplaced, and the kitten will not be in your household as long as the cat is.
3) Supervised interaction! Nobody should be holding cats at this point. Do both steps one and two several times for about a month. In this step, nobody i holding the cat but theyre both in the same room. Let them start far away and gradually move closer if theyre comfortable. Repeat this step several times.
I wish you the best of luck, doing this really makes a difference, rather than just introducing a new pet!