How can we say no to this mentally ill lady you cant do her laundry anymore?

There is a lady that I see 3 times a week to give her personal care. There is another girl that comes to do her home making services, such as cleaning, going to the store, laundry or whatever else. Well I just found out this lady is schizophrenic, and Bi Polar. I was often wondering why she was so hateful and than loved you again. Well the girl that does her home making services has been taking her laundry home with her. Well she is in her 40's working 40 hr's and going to nursing school. Your really not supposed to be taking her laundry home through our works policy! But she has been so kind hearted and been doing it. Well I give her the bath, and this lady is constantly blaming everything on the homemaker, and talking about her like a dog. She is constantly blaming my co worker for her laundry not being clean correctly, and misplacing it, stealing it, and leaving the toilet brush on the counter after cleaning her commode. Which I know that the homemaker would NEVER do. But, for both of us its getting bad. She is constantly finding all the clothes saying there dirty and sending the homemaker with bags of clothes everyday and than I have to hear about it and its taking an hour just to pick out clothes. Well the homemaker and I have been talking on the phone and she is taking care of her sick mother, going to college, and doing all kinds of things. Well she said its to the point where she cant take her laundry home anymore, because its raising her water bill, and she has loads to do at home with her own family, and not to mention the other problems. Well now that I have mentioned quite a bit about this situation...How in the world does she just stop without the lady telling on her for taking it home, and without hurting the lady's feelings. I know we both try and not to take this lady personal but I'm telling you she is just one of those constantly degrading you to your face a little and behind your back to your boss or whoever. Another aide use to take her stuff home, and it got overwhelming in the same situation and she told our client that her washer broke. I dont know if you could use that same excuse. She will be very upset and cry and everything else. I'm not really familiar in how to handle someone with these problems. Nothing is ever right, and when it is she loves you. But when you leave she is telling everyone how horrible, and everything you supposedly "didn't do for her that your supposed to". And let me tell you she is mean and cruel with a potty mouth lol, but we know she dont mean it. When she doesn't realize we go out of our way. But basically she just can't take her laundry home. Any suggestions as to how to tell her you cant do it without making her so angry or getting in trouble? Sorry this took so long to explain. thank you for taking the time out to read and give suggestions. Best points to the best answers i guess