i agreed key phrases. id recommend it. something unrelated to the family and totally arbitrary, agreedupon only verbally. (or write it down for them if they are old and memory is an issue. you can remind them to read your note out loud.. easy).

this way, you do not footgun yourself in the event you'd ever need to ask something. Money isnt the only thing they can ask, and no one (i think) has a glass orb to tell their future and know for certain such a call would never happen. its easy to think it wont happen to you, i think that is most peoples' sentiment until it does. (having a need for help from family that is)