@FelicityPike I have spoken to solicitors, etc, many times, but nothing has ever been done, essentially because there are no bruises on dd, for want of a better way of putting it - emotional stuff like this is very hard to prove. I can only hope that one day someone will do something. You are right, it is an awful conversation. Just to be clear, I never start that conversation. Dd will be in tears and I will ask her if she wants to talk, and she tells me this by her own choosing. That has always been my approach over the years - not to push her or make her feel uncomfortable, but to provide a healthy space here when she's with me, where she knows I am there to listen to her if she ever wants to talk.
@Tacca I appreciate your insight. Thank you. You are right, dd is trying to keep herself 'safe'. I can really empathise with that. I thought I should point out a few things for clarity:
The wedding had already been discussed with my ex (we have an unwritten agreement that we will allow for dd to attend family/important events like birthdays, weddings, funerals, etc, even if it's during our contact time). This is where my ex flipped it and had an excuse (dd doesn't want to go).
I don't go in to detail with the backstory, as this unhealthy behaviour has been going on before dd was even born, and at some point I feel I have to stop repeating the same anecdotes otherwise I would be forever on forums writing up mine and dd's story over and over (I would be happy to chat more by pm if there was anything particular you want to know). I'm not interested in waging a hate campaign against my ex. If dd wasn't being affected I wouldn't be on here. I have always remained the amicable parent between me and my ex, and unfortunately that has never been reciprocated. It's a challenge every day, but I remain grounded for dd's sake.
I can't emphasise enough how I play my ex's game, to keep things as good as possible for dd. My mindset really isn't on being angry at my ex, it is on dd, and helping her as much as possible, whatever that might entail - whether it means chatting with her one week, and not saying anything the next. I am just trying seek some advice, but because of the nature of the situation and the nature of my ex's behaviour, I will inevitably have to mention her name and what she is like. This is someone who doctors, police, therapists, services who help people with domestic abuse have all said to minimise contact with as much as possible, which I have done, and who have all said (on hearing my story) is narcissistic. I have real concerns for dd and I am struggling to get anyone of authority to step in and take action, so all I can do is put her first, like you say, and do what I can myself to make things easier for her. And sometimes that is standing back and not saying anything at all. For instance, I keep my distance at handovers, in an effort to prevent my ex from berating me in front of dd, so dd doesn't have to witness that. Sometimes, there are situations like this, where I just really want to do the right thing for dd, but I am not sure what that is, as I want her to know I understand how difficult things are for her, but I don't want things to keep snowballing the way they are, and for instance, find in a few years, when let's say I get married, for example, dd doesn't want to come, or doesn't want to go on holiday with me, etc.