I fully understand what you are going through. It is hard seeing them decline, when we get to see our loved ones we are busy making sure the bills get paid (I do this also for her), medication is being taken (I can tell when she is not taking it), she still lives in her home but we are working on getting her into senior housing.
I was able to get some help in the house as I mentioned in a previous post.
Is this an option for you, to get help in the house during the week for your parents?
It takes time to find the right match with a homemaker, nurse, aide, etc..but once I see it's working it eases a little bit for me with the stress. The problem is also other family members who dump their problems on my grandmother. She doesn't need that. They need to grow up but that will never happen.(This a whole other story). The others in the family are so oblivious to what is going on but when the day comes she is no longer with us,they will be the first ones with the oh this and that bull with their hand out. They are in for a rude awakening. They do irk me.
I know it's gross to talk about when a person passes on but it's a fact that people come out of nowhere looking for what they think is rightfully theirs in their mind anyway. I've seen this before and it's very selfish and sickening. To me if they can not be their to help out when times are tough then don't bother coming around at all.
I know the guilt all to well also. That just shows how much we love them and want the best for our dear elderly family members. I stay up at night wondering what is going to happen? Why do they have to decline like this? I cry often, it was the hardest thing losing my grandpa who took over the place of my own father (who walked out of my life). And to know this is what is in store for most of us, it really stinks.
I'm here anytime you need to talk.