AN and OPO, I've been thinking about you and the situation with your DDs for a while, and have a thought that I want to share with you but am really struggling to express! Anyway, the thought is whether what's going on is projection? As in, you each projecting your childhood self onto your DD. When we are hurt by our parents, we cannot blame them at the time, it is too unsafe, so we have to blame ourselves. (And they of course they ususally blame us too so that reinforces it.) So we build a picture of ourselves as being blameworthy, unlovable, deserving of punishment/cold treatment etc. That internal picture stays with us maybe our whole lives unless we take active steps to change it; and unfortunately, being able to intellectually identify that we were not to blame is not enough (though of course it's a necessary step). We have to somehow change the programming in our brains that was set at such an early age.
So what I'm thinking is that maybe because they're girls, when you see them, you see the child you were who was hurt and all those feelings of blaming yourself are transposed onto her, her vulnerability and innocence, instead of inspiring the natural reaction of protection and love that you would feel if you'd been protected and loved yourself (and that I know you want to feel and are trying to create), instead causes you to feel the way your own mothers felt towards you. So it's almost like you become your own mother, and your DD becomes you as a little girl.
So a tactic I would suggest is that when you do feel irritated by them or cold towards them, say to yourself "this is how my mother/father felt towards me, this is how they treated me" or if you're blaming her, "this is how they blamed me" and try and let in the compassion for yourself suffering through that - and then hopefully that will stop the projection so you can see your DD for herself and let in the compassion for her too. I know you're both doing some of that anyway, but just wondered if this perspective might help a little bit.
I think when you're talking about the peg thing, AN, I would call that projection - quite often there is one child in a family who fills that space, Smithfield maybe in your case it's your DS? I don't know, am just speculating wildly, sorry if unhelpful.
Certainly for me I am aware of projecting my child self onto DS, and getting angry with him just like they got angry with me, and I can feel this part of me that wants to blame him, wants to make it his fault, this part of me that is my internalised parents - even though I, the person I truly am, believe 100% that it is never the child's fault (right with you there on that one, OPO). Like I say, believing something in your head isn't enough to magic away all the years and years of programming that have built up layers and layers of protective denial. I thought I had done so much work on this before he was born that I would not repeat these patterns; I was really shocked to find how deep it goes and how hard it's been to change it. I have sometimes thought what a good job it is I had a boy, as I really think I would have found it even harder to disentangle me from my child had I had a girl. I would never have believed I could shout at him like I have done, and it 100% isn't his fault; but we are only human, and if this is how we were parented, with the best will in the world, we cannot help but replicate at least some of it. At least we acknowledge that it is not our god-given right to treat them like this, and we apologise when we do this to them.
AN, your post about trying to get it right all the time really struck some chords with me. I too have often felt that if he's ever distressed, I have to fix it, it's a sign I'm not doing it properly, he mustn't ever suffer! But of course that's unrealistic. I don't think any parents can protect their DC from all pain and distress; and certainly not us who are battling with the damage caused in our own childhoods. How can we be damaged so deeply and yet still expect ourselves to function as if nothing had happened? It's yet another aspect of the damage and the denial, that we expect such high standards of ourselves, when we should really be cutting ourselves a little slack.
OPO, I'm so glad to hear that you have already noticed a change in your DD since working on your own issues. It's proof that whatever mistakes we do make, we can correct them if we have the intention and the will to work at it. And surely too we've got to have the right to make mistakes - cause everybody else does!