Elder cat nearing end of life , family refusing to prevent and avoid his suffering

forgive me if my writing is a bit disjointed, I feel a bit distressed.

one of my best friends in the whole world, a 17 year old Norwegian forest cat, has been slowly declining the last month or so and in the last week has been very clearly and very obviously unwell. he is still alive right now.

I feel fear that he may die traumatically because my family feels there’s some moral obligation for things to “run their course“ and do not actually understand the biology of organ failure and how cats function/express their pain.

if there are questions I can answer them, but providing all the context to this situation is exhausting and I just want him to be comfortable and for me to be present for him.

my moms arguments jump around as they always have, and I was totally willing to accommodate what she suggested initially which was to find a mobile vet to help the cat at her house so that he could pass peacefully. she later refused this completely, acting offended that I would even let someone into the house to do this. money is an issue for her but all of us (her kids) can afford to cover this. the denial is very real despite it being clear that it’s inhumane to keep him awake- he’s refusing all food and water, can’t stand up on his own and has been checked out. I took him to the vet today because for the first time there was blood in his urine and he was starting to stumble. I took him back home and made sure we got lots of nice time in the sun together and he got some cuddles and at least a bit of water through syringe.

I’m going to go back to the vet tomorrow to at least try to get some pain meds for him but i really just feel so sad that opinions and complete willful ignorance are prolonging potential suffering of my sweet baby. any argument that I have is completely denied, it’s awful. he’s the closest being I’ve ever had to a grandfather and also a baby brother haha.

advice would be nice but I don’t know if it would do anything, unless you’ve also experienced something like this. i just really love my guy.