Original Commentary
If you couldn't tell, Brisbane and Emily don't really like each other. At all. Emily really needs to learn to share.

Modern Commentary
So, why doesn't Emily like Brisbane?
Well, there are a few possibilties I'll go over during this storyline.
One: Emily feels that Brisbane is competing for Kimberly's time and attention. This is one of the main ones. Because Brisbane is around, Kimberly has other people to hang out with and is spending less time with Emily.
You might say that Kimberly would rather hang around anybody other than Emily. Apart from Ms. Taylor you'd be right. - Terrence