Kristi,
Good for you for getting counseling. It will help you to know where and how to drae boundaries. Unfortunately you can' force other people to be caring, understanding, or helpful but you can define your own boundaries and what is and isn't acceptable for you. It sounds like there was an issue with your brothers before your parents became ill and unfortunately the illness only exacerbates the problems that were already there. I'm glad you are getting help with the cleaning. You may have to rely on outsiders more than your brothers, I'm afraid.
I'll be thinking about you,
Susan