Its great that you have a son there for support, but to want him for personal care is really asking way too much
You are not keeping your independence relying on your son to get you to the toilet. You already need help. And sorry for the bluntness , being guided to the toilet soon becomes needing help removing underwear and wiping - do you want your son to do that?
Ive been a carer for the past 20 years - Im 62 and finally have my home back - I buried step dad in 2011 and mum last week Me and DH were their support system, they lived with us but were independent , and we were there as they aged and could no longer cope with running a home themselves. I did washing cooking cleaning. We had to live our lives as being 20 years older , as we had to live to their wants and needs
Mums death was quick, 4 weeks from admission, possible bowl obstruction - turned out her bladder cancer which had been managed for 15 years had exploded and had invaded bowel , uterus, ovaries and just about every where . She was on a catheter and driver within a week and in a nappy after 10 days - still they were arranging her discharge to us and I had to hold my ground and say not a mission without 2 carers 4 times a day as well as community and Macmillan. I buried her last Thursday, the Thursday previous I had community saying they had the air bed for her and when would they deliver !!
There was not a hope in hell, with all the will in the world, could I have taken care of her at home , I am half her size and weight, I couldn't have supported her standing Even the Physio at the hospital had stopped working with her to keep her mobile for discharge as she was too poorly
Im not saying your prognosis is going to end up in death, but your treatment is not going to be easy and you will have "accidents" there will be times when you cant even hold a glass - do you want your son to be the one who puts his life on hold to do that for you?