It’s very hard to say what you will do in that situation until you are there.
I am an only DC, DPs live an hours drive away,I work f/t and until recently- despite being very elderly- they were managing ok. House needed deep cleaning, but I had helped DM fill out the forms for full attendance allowance over a year ago and I figured she could be using the money on a cleaner so I only tackled things that were a health hazard.
Anyway 3 months ago the wheels fell off the bus and DM had a minor fall, since then she has been bed bound. It turns out DFs memory is not what it was, so that is also a concern. Thank goodness we live in Scotland so she gets free carers, as although they have more money than they know what to do with, actually getting them to spend it on their own care is a stiff battle. I finally got the cleaner in.
Work kindly let me condense my hours to 4.5 days - DH and I both tried working up there, but it wasn’t massively successful - so I go up once a week unless we have plans at the weekend. I have been doing chores I never would have imagined like changing sheets. I refuse to do anything personal- for example we have these shampoo hats for DMs hair but I just can’t bring myself to do that, but some of the carers do it occasionally so that has to be enough. DH also goes up and DS 19 sometimes goes up to take DF out for lunch to give him a break, so that’s really nice.
I refuse to give up my job - although i am on a contract so may not have much choice as don’t feel I can launch into another high powered ft role, nor my holidays- although obviously if there was an emergency that would be different. I feel like I am treading a very thin line at the minute, but the important thing for me is that I do enough so I feel in my mind I am a dutiful and loving DD, and that involves putting others expectations to the side.
My friend - same age 55 - has given up her life for her DPs. She mostly lives with him now and works and that’s it. But that’s what she wants to do, so much as I think she is sacrificing too much, itself her choice.
It’s all vastly personal OP. I do think saying you will do absolutely nothing is harsh, but I do understand rejecting a carers role when you don’t want it - most of us don’t want it, believe me !