Hi, Kris, and welcome to the forum. I'm sorry for the reason you find yourself here, though. It would seem that your mom would need a double transplant--both kidney and liver. So the doctors may feel she is either not well enough to endure that or that she would not live long enough to receive them. Did she just suddenly become ill or has she had kidney issues for awhile? Also, the symptoms you are describing sound as though she has some encephalopathy due to high ammonia levels. This is usually treated with Lactulose, where the ammonia is eliminated through BMs. Have they been giving her that? If I were in your position, I think I'd want to speak to her hepatologist, if she has one, or get a referral to one. The kidney issue is being dealt with via dialysis, so I imagine she will be seeing a nephrologist (kidney specialist.)
Regardless of the situation, she might feel better if she eats a diet free of red meat and high in fresh fruits and veggies. No alcohol at all. Nothing fried. If she is not retaining fluid, make sure she stays hydrated with water.
I hope this helps a little, but as David suggested, you really need more direct answers from the doctors. In the medical records you were able to obtain, did they give a prognosis?
The loose stools could be from Lactulose. That's what it does. Was there a type of liver disease specified? Since she has RA (an autoimmune disease), it could be Autoimmune Hepatitis (AIH.) What do you mean by "double dialysis?" Dialysis is normally done 3 or 4 times a week. Do you mean the formula they are using for dialysis? You really do need to pin down her doctors. Ask what her discharge plan is going to be.
Okay, so it's not Lactulose causing the diarrhea. And she has NASH (Non-Alcoholic Steatohepatitis), the medical term for fatty liver disease. Treatment normally includes losing weight.
If you cannot get more information out of the doctors, you may need to get a Medical Surrogacy so that you can obtain all her medical records and also can make medical decisions for her if she is unable to do so. She also should have a Living Will if she doesn't already have one. It depends on how involved you want to be in her care.