Thanks everyone for your replies and support.
I am afraid that I have messed up big time and that it has all escalated. I had a missed call from DD1 and then a message to say that she had feared a miscarriage a couple of days earlier. I called back and we chatted, she had been very busy, a lot to do with her course, the DGDs etc, was very tired. She was having a couple of days off. I expressed my concern, said take care of yourself etc, your health is the most important thing. I also said how I was still struggling a lot without DH, referred for bereavement therapy, hard to see the joy in life etc. And she seemed sympathetic and said, meaning well, that the new life is joy ie DGC3. And I said, stupidly, that I don't suppose I will see much of DGC3 anyway, that I was afraid to form too much of an attachment to the DGCs, as they might be taken away and I couldn't cope with more loss, that I didn't understand why she had concealed DGD1's birth from us, or her marriage. I said that if a couple wanted to get married privately, then I would understand it, but why would she have all of LB's family there and not tell us. And why move and not give us the address - it was not as though we would turn up on the doorstep and harass them. That it was like something from Jeremy Kyle and that ghosting was either cowardly or a form of emotional abuse. That she was my daughter, that I would always love her, but that the hurt still ran very deep.
So, she said she was upset and that I was causing her stress, for which I apologised, and then she hung up on me, and subsequently sent an emotional message about how we, ie me, DD2 and DD3, were emotionally abusive, utterly selfish, having this conversation when she was at risk. 'You have deliberately chosen your feelings above my health and pregnancy. That is selfish. In fact, that seems to me to be emotionally abusive...Despite this ideal which you all have of yourselves, actually you all have a complete inability to empathise with anyone else. Only your own feelings matter. Which is why you are all happy to paint me out as some villain because it suits your own narrative of yourselves being 'so hurt' and 'emotionally abused'. There are two sides to every story. I'm not going into any of this rubbish again. I've wasted too much of my emotional and physical energy on it in the past,...It's unfair and unfounded. I can't even begin to count the amount of 'water under the bridge's there has been. You think it's only you who are entitled to have feelings. It's absolutely horrible every time this gets dragged up when both LB and I have put in so much and forgiven so much for the sake of moving forward. I'm absolutely sick to the back teeth of it. And once again, I don't know why I'm spending my physical and emotional energy on this. It's detrimental to my health.
So, I discussed this with my therapist, who said that she thought my language had been a bit harsh, but that I needed to stand my ground. And I sent a message along the lines which we discussed, saying that I was sorry that she was upset, that I had not intended the conversation to take the turn which it had, but there was still hurt and bottled up feelings, that she must put her health first, that I knew that she was trying to comfort me by talking about new life, but that it was triggering that DH had not been able to share more time with DGD1, and that I was very hurt that they had not wanted me there on her birthday, that her DGPs had always come round on her birthday and that it would not occur to me to exclude them or not regard them as family.
I also said that of course there were two sides to every story and that I respected her feelings, as I hoped she would respect mine, that I was not in a good place, devastated without DH, diagnosed with clinical depression, also can't cope with more loss or emotional upset, that she was my daughter, that I would always love her, and wished for nothing but good things for her and her family.
To which I received another angry message saying it was ridiculous that I was upset about DGD1's birthday, that they just wanted it to be the four of them, especially as I had suggested it. And, it is true, I did say that it was fine if they wanted to be alone - but I was being polite, fully expecting them to say that of course I must come, that I would be welcome. 'I don't know why you couldn't just be happy to come and see us and spend time with us, It's like you are purposefully choosing to create a drama out of nothing. It's a real shame and to be honest just sours the whole potential visit.
So I called today, said it's not a good idea to send all these emotional messages. I asked her if she were ok, which she said she was. I said that's good, that's the most important thing. She said that it had being going on for so long that people remembered the hurt and not the detail and I agreed with her, said I wanted to move forward, that I thought that we were doing so, but it wasn't linear, that there were some bumps in the road, but that with love we would overcome them, that I loved her, but not mentally ok at present.
She said we were just going over old ground and nothing got resolved. I said that I thought that the problem was that we never spent any time together. Apart from visiting DH at the hospital when he was dying, we had not spent any time together as mother and daughter for literally years, which is why I had suggested the spa trip. That she was my daughter, that I loved her, that I wanted to reconnect with her. She seemed to be amenable this and also to the trip - I said of course I would do if I were welcome. We were at the point of agreeing that I would book dates in June or July with a view to spending one day with the family and one day with her. Then she said she had to ask LB as he wasn't very happy that I had upset her. I said why, is he protecting you from your evil family and why do you need his permission. She wants to discuss it with him, so she is messaging me tomorrow.
So I have blown it all, just as it was getting better. My therapist thinks that we would have had to have the conversation sometime. DD2 says that I am in no fit state to have these conversations (she partly overheard) and to detach and relax, that DD1 has her own baggage in losing DH, which she does not envy, that I must live in the present and not be angry for DH as he would not have wanted it, have a bath and watch a film. I said I should be paying her as a therapist 