Was chatting to John yesterday on the phone about my sister's current state of health. He took the opportunity whilst Maureen wasn't around to be brutally frank about just how less than optimal that state is, and has been for several months. I'd guessed this already, but it was painful to have my conjectures confirmed.
This doesn't bear thinking about. Which means it's important to think about it and consider what might be done. Even if the answer is, most likely, nothing.