Having a conversation with your parent in advance is always the best option.
Schedule a time with your siblings in a public location without their spouses so you can decide what is best. Keep in regular communication and schedule time to address the issues, such as visiting, cleaning, making sure they eat and take their medication, get to doctor appointments, etc.
Ask your parent(s) about the following:
End of Life Decisions:
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1. I am never growing old.
2. My kids will take care of me.
3. I am not leaving my house unless it's in a pine box.
4. The government will take care of me if I run out of money.
5. I am safe because I have long-term care insurance.