Once again thanks to all for the positive and supportive responses.
@Leapfrog44 I am absolutely going to try and remain calm and reasonable even though I'm mad inside!
I'm waiting to see if NSPCC will have any further advice and hope to speak to a solicitor this week.
@jessebuni That's a valid point about his desire to start afresh - in October he went abroad with his gf and children and left DD out. We found out 4days before he went and it meant he missed a planned weekend with DD so it's possible. But desperately sad. All I've ever wanted is for DD to have a relationship with her Dad as it wasn't her fault we divorced. Unfortunately as the years have gone on I'm realising it works both ways and I can't 'make' him see her.
@pinkyredrose I've not met GF or children. DD does get on with them and generally enjoys their company.
@impossible I reached out to the gf! Having never had contact with her I had hoped that as a mum of 2 she would at least be willing to discuss or acknowledge my DDs concerns. I was very careful not to suggest there was anything untoward and repeated how much my DD enjoys spending time with them all and that I wanted this to work for everyone. The only issue was the sleeping arrangements.
She responded that she was not interested in anything I had to say, that she was not going to change her life because of me, that what went on was none of my business etc. She then began personal insults.
@AnoukSpirit Unfortunately you are spot on. I eventually left him 5yrs ago after 15yrs together. I'd stayed for what I thought was DDs sake for too long until I realised that I was not providing her with a positive example of what a relationship should be. At the time he resorted to some low tactics to prevent our separation but I stuck to it. He presented to everyone else as the "ideal husband and father, a doting dad". I have always hoped that he would stick to his promise of putting his DD first and protecting her. I'm realising I'm fooling myself.
My DD is unfortunately more aware of her Dad's negative traits than I thought.
Tonight's question was "what if Dad tells you that I don't have to share with X anymore but then takes me there anyway so I have to?" She's too young to have to start mistrusting, especially her Dad.
I'm incredibly proud of her for being honest and have reassured her as much as I can, telling her that I will not make her go for an overnight stay with her Dad until we are both comfortable and confident that she won't be having to sleep in same room as X.