First time I heard the word 'Botheration' was on a Maid Marion episode, written by Tony Robinson who also reads and had a minor role in Hogfather ...
Had to put in the Pratchett connection thing there!
Btw Botheration was said by a wimpy Guy of Gisbourne!
If this was published for any reason I'd buy it! But for Alzheimer's definitely my grandma had Senile Dementia - not quite the same thing - but it was horrible watching her lose her memory. She reverted back to her childhood.
I truly feel for Lyn and Rihanna ... it must be terrible for them to watch a man they both love suffer!