We're not overly close (some might recognise me from stately homes thread) but live nearby. I have a way of 'managing' her which is fine, I can deal with.
She has various health issues though - she was in hospital for months last year. Since she got out shes changed, really aged in her outlook.
Shes given up driving, she won't go to their holiday house in Spain because she says she can't manage it, shes on the edge of tears all the time, she won't go shopping without my dad etc etc. I think shes depressed but if I mention that I get shot down (ex GP knows better than anyone else)
She rings me most days talking at length about herself, her problems & how scared she is of dad dying. I'm trying to be sympathetic & listen & offer words of encouragement but its not enough. She rang just now & I didn't pick up so she left a message saying how shes had a bad day & everythings gone downhill 

I feel bad but I honestly cant face another similar woe ise conversation. Im a single parent to 3 & I havent got the energy. Any advice? Shes 65 btw