No, it's definitely not a premonition. I was probably in "scan-mode" (not to be confused with SCANNERS mode) and combined with a lack of sleep, misread something you posted.
Losing someone you care about is an amputation, plain and simple.
Your thoughts on audio-books for your mom reminds me of a story Krist Novoselic from Nirvana told about Kurt Cobain, and how he still looks for left-handed guitars for Kurt in pawn shops, even 25 years after his death.
I'm sorry about your mom. Hearts can't forget, and good thing, too; if nothing else, that's a kind of immortality.