It's no trouble, I name change for professional posts, but under a different name I'm on MN a bit (and have had enough help from it myself in my time).
Yes, sorry, when I talked about fluid in her tummy I was trying not to use medical terms, but ascites is what I meant. It is something which can be drained, but with a large needle (sore) which can lead to infection in the remaining fluid, and which occasionally can lead to a perforation in the bowel. Which is why, if someone is very ill, it's just not worth it.
Liver failure can lead to sleepiness and, dh be warned, sometimes a lot of confusion (on top of the morphine).
Her constipation may be because she's not eating, side effect of painkillers (codeine, tramadol, morphine), pressure effects of tumour on bowel. It can be quite uncomfortable and can also lead to confusion. If it's a worry, and if she's taking anything by mouth she could take lactulose (a laxative, which is also used in liver failure to reduce encephalopathy). Or suppositories.
Liver failure means that the blood doesn't clot properly - the liver is very important in blood clotting. It isn't unusually to have bleeding in advanced failure. Her skin may bruise easily also. She may also have a diversion of blood from the liver to other places, so stomach bleeding is more common, and they get dilated veins in their skin.
Eating isn't important. If her liver is so badly failing as it sounds, it is unlikely that she will be absorbing much from anything which goes in. It makes relatives feel better to think that someone is getting food and/or fluid in, but TBH, it's unlikely to be doing anything. If her mouth is dry, dh should be able to get hold of little mouth sponges to relieve it. If she is bleeding a lot into her stomach, giving her stuff by mouth, I don't know, I just think I'd be talking about removing the NG tube myself.
I'm so glad that her pain is under control. FWIW I agree with you about the spiritual side, I can't believe she doesn't know, but totally agree, they 'need' to say goodbye. But that's their culture.
Sometimes, people to get a lot calmer very near the end. Whether they say it out loud or not, they accept that they're dying, and often go quickly after that. I hope she has a peaceful night. I'll keep checking the thread.