Sophie56, your comment rang a bell with me:
'I am sure is a duty call and he is clearly irritated by me.'
I'm sorry to say that I found my mother extremely boring and irritating in her later years. She would insist on lengthy phone calls and tell me (in infinite detail) all about her minor health niggles, her neighbour's activities, her shopping trips etc. Interruptions were unwelcome. She'd ask, out of some residual politeness, I presume, about the family, then quickly dismiss the subject. (I'd be lucky to get a complete sentence in.) Then a return to the endless moaning about her imagined suffering and the wrongs and evils of the world.
Having been a vibrant, enthusiastic and busy liberal, she took to reading the Daily Mail, which didn't help matters either. Her world had shrunk to the mundane and she had no interest left in anything (besides herself).
I live in dread of ending up like that but can see it looming out from the future. My children ask what I'd like to do, what plans I have - and I find myself perfectly content to get a decent sleep, walk the dog and do a little gardening.
Things that I used to enjoy (and talk about) like travel, learning, celebrations, new experiences and friends now present more fear and worry than pleasure. I put them off (if I can) for some day in the future when my back injury won't restrict me, my energy levels will be good and I'll cope well. When will that magic day be?
I try really hard to be involved with my family and ask all about them. I often have the grandchildren to stay. I resist talking much about myself, yet still I dread making arrangements to travel or have days out as often they're an ordeal rather than a pleasure. I drag myself through them with a smile slapped on my face and painkillers at hand in my pocket!