Oh gosh, my heart is breaking for you. You are being the most wonderful, supportive daughter ..... and good on you. xx You are carrying a very heavy burden ... and I 'get it' as I am in a similar situation - but with my husband. It is tough. I hope you have really good friends & other family around you for support, too. The palliative care people are REALLY lovely - and have counsellors if you need to talk to someone to help you cope too. They also have volunteers who will sit with your Mum when you need a break, as she becomes more vulnerable and they will also provide equipment (wheelchairs etc) as you need them. I know your Mum will enjoy her garlic seafood lunch and Baileys on ice YUM! .. and spending time with you on Xmas Day - make memories ...
Take care and we are all thinking of you xx