My 2 Year old Cat HATES my New Kitten?

She should get used to it. I have five cats, so I've been through this process four times. At first, they hiss and growl, but after a few days (it may take weeks but it happens), she gets used to the kitten. To speed up the process? I would suggest keeping them separated, and only introducing them for a few minutes each day. Don't leave them together unattended (as you probably know), because the older cat might want to harm it. After a while, she'll get used to the baby. Don't worry!