Hi,
how long has the kitten been with you ?
I think you should let the kitten settle in your bedroom for atleast one week before introducing her to your other cat.
Let the kitten get used to you and her new surroundings first. Poor thing she must be so scared and confused right now.
The best way to introduce them is to give the kitten her own blanket to sleep on and same with your other cat. Then after a few days give your cat the kitten's blanket to sleep on and give the kitten your cats blanket. Then eventually they will both smell the same as each other
Your cat might growl or spit at the kitten's blanket at first so try putting a piece of her favourite food on the blanket for her to eat. Also you can buy Felifriend spray. it is a friendly pheromone that cats give off like when they rub their faces on furniture. You only need to spray 1 or 2 squirts and she'll love the smell of the blanket and get used to the smell of the kitten at the same time.
Here is a link where you can buy it on line
http://www.bestpetpharmacy.co.uk/detail ... asp?id=500
Eventually the kitten will smell like the rest off your home. Just give them both lots of affection when they meet so they don't become jealous of each other.
Good luck