A provider from Dallas told me one time that she just came out and told her mom about what she did for a living. After crying, her mom was open minded and accepting of it.
But since that's not the situation with everybody, I would say to add some other stuff to your "line of work." In addition to being whatever assistant you are claiming to be, tell them you're also doing Mary Kay, Avon, Herbal Life, or something of the sorts on the side for extra cash.