…my mother (already over 90, practically zero short term memory) went through a phase of wanting to go and visit her parents (dead some 30 and 50 years). ‘…because they must be getting old and could do with some help.’
The house she was thinking of had been demolished in the 70s, and she hadn’t lived there since the beginning of WW2!
Being by then very adept at the good old ‘love lies’ I would say I couldn’t take her today, because my car was in for a service/the road was closed because of a bad accident)roads were very icy - any other plausible sounding excuse - ‘but maybe we could go tomorrow?’
Always kept her happy for the moment.