Lek8, I just wanted to welcome you to the forum. The others have pretty much said it all. I have hep C and cirrhosis and am a liver cancer survivor. I quit drinking in 1986, years prior to my diagnosis. I'm positive if I hadn't quit, I would not be here now. Quitting drinking is the most important thing that your mum could do to control her cirrhosis. However, with her continued drinking, not eating, and sleeping all the time, she sounds in bad shape and will certainly die sooner rather than later. Just when, no one can say.
Hugs,
Connie