Original Commentary
Kimberly really is doing the work of several people with her on-line job... I don't think Kimberly would trust anyone else to help her with the work- or would want to share the profits with anyone either. -Isabel

Modern Commentary
It's common knowledge around the place that Kimberly lost her job? Yeah, I guess Brisbane talks about their lives. There's no way they'd get that information from Kimberly. She does not want to know or be known.
This is why Kimberly is afraid that her mother will be able to get information from Brisbane, though. - Terrence