Thanks CC. Scary isn't it!
I've been trying to reconcile the concept of an overcoat of shame and the pit of shame. I think they are two different things.
I recognise the overcoat now and the link with RG's description of where it comes form - (it occurs to me it's something that perhaps we could physically shrug off our shoulders with a shake!!??!). I think mine is more a cloak of invisibility!! Hmmm...interesting concepts, these!!
But the pit of shame...
Groan. I find I just can't enter into a better understanding of this right now as I'd intended. I've just had an email from a cousin telling me that my problem with my mother is
"a) your sensitive personality (someone else wouldn't take her to heart so much)

and
b) you have been her undiluted focus. It would have been easier for you if you had had brothers and sisters."
No, no, no, no, no!!!
Her mother is my mother's sister and I'm discovering that they were as like as two peas. I thought my cousin had begun to understand her own predicament - especially as she and her siblings were manipulated and set off against each other and she KNOWS that.
(Oh, here I go struggling not to descend into that pit of shame!!)
I'm trying so hard not to say 'it's me, of course it's me, it's all me. It's my fault, I am so shameful for thinking these terrible thoughts about my mother, how could I think she has something 'wrong' with her, of course I should be able to deal with her, elderly, sweet, vulnerable. there's obviously something wrong with me'

Just like with the therapist. Of course it was all 'my' perception, my fault, or maybe it just never really happened (except I know it did!!).
But I 'know' from what I've read that it's wrong to say it's because I'm 'sensitive'. That's what set me on this trail in the first place. I was rivited by reading 'my' experience as someone who always felt 'no-one would believe me' because no-one has seen exactly what goes on, no-one has experienced it (and I couldn't explain it) - and people don't 'want' to believe it, anyway. It upsets the applecart.
As father said : 'She doesn't really mean it...'
But the scorpion doesn't 'mean' to sting the frog and drown them both!!!
'It' 'it' 'it' - what's 'it'!!!
What I fear most is becoming the scapegoat, the receptacle, the dustbin for the family as a whole. I'm good at knowing what a group wants and then supplying it. I despair, I really, really do. Let's all lay it on [R], then we can be 'well' and she can hold it for all of us.
Two are nurses, one is a doctor and one has been diagnosed as 'bipolar' (eldest/black sheep/scapegoat as a child) so you can bet they're experienced at it.
That's what I feel about my mother, too - she 'dumps' all her rubbish in me so I can be the one who is ill (then she can look after ME!!)
I think my father's death may have catapulted my mother into the worst of her 'disorder'. And I know I'm a Myers Briggs NF (Intuitive/Feeling) type but, still...
I've got that 'rabbit caught in the headlights' feeling again...
I've been sensitISED my husband has just pointed out (gem of my life).
Thanks for letting me rabbit on!!!

It's so good to feel I'm speaking out, and speaking up, even if still 'invisibly' behind my anonymity.
[Three years later, I discovered that my mother had Aspergers Syndrome - as did my husband and son - so that's what 'it' was! Please be gentle with people who have AS because they mean no harm even while they cause us terrible distress. WE cause THEM terrible distress without meaning to, too]