Can I be on section 8 and take care of my Mom too?

Camsue, do you mean that you've moved your mother into your section 8 residence? Or that you are getting paid to help her somewhere else?

I don't understand the question.

Possibly. If the housing authority has been advised, and given permission, and adjusted the rent to include both incomes, OK. If you just decided to move her in, then you will be evicted. I know a girl who took in her girlfriend because she "had no place to go". Both were promptly booted out.