Just had another think about this...I mean honestly I would just bin her off...but I have an older relative who is quite negative and her best friend deals with her like this.
"Gosh. It all sounds very overwhelming."
"To be honest, I'm not sure how I should respond...it's rather a lot isn't it?"
"What a shame that you seem so upset. I was really looking forward to unwinding and relaxing today..."
"Sorry, Audrey, I feel stressed just listening to all of this. I don't mean to be rude but could we talk about something a little more lighthearted?"
Or when she's really pissed off...
"Wow, sounds difficult. Did I tell you I had tickets for the Strictly tour? I'm really excited. Have you been watching anything good on the telly?"
She has the patience of a saint. And older grumpy relative rarely takes offence, she's just learned she won't get much sympathy anymore and offloads on the rest of us.
How do you respond when she starts telling you all of this? Sounds like she's put you in a bit of a therapist role?
Maybe praise how she does your hair but don't take much notice or give much feedback about her personal life...take a magazine/book/ipad and just keep looking back at that.