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Personal trainer can be a job that pays well per hour, and is good for your health too, physical therapist or any type of motivator.

An actual doctor or chiropractor would likely take more years of schooling, but it is a good long term career choice. Chiropractors can spend time online playing poker between patient visits.

Any job that can be done via the phone or that doesnt' take long hours of actually working, but many hours of being "on call."

I know of executives who are looking for personal assistant, but that job may be more of a live in glorified chauffer job. It may not suit your mother's taste of career advancement, but it does involve hours of sitting around waiting for other people. Mobile phones/PDAs do poker these days.