Name changed for this.
I've been in a relationship with a man for the past 18 months - he is lovely, we are very well-suited etc etc.
He has two daughters from his marriage - they are 4 and 6. DP and his ex-wife separated around 3 years ago - living in separate houses etc., but hadn't got round to getting divorced. Perhaps this should have been, but this wasn't a red flag to me - my own parents remained married for a long long time after their separation.
His relationship with his ex-wife (calling her ex for shorthand, I appreciate they are not yet divorced) is somewhat challenging - it isn't terrible and mostly they co-parent well but there are a number of on-going tensions. Last summer, for example, partner was vetoed from taking daughters away for a couple of nights while ex-wife booked week long holiday abroad for her and children with no communication in advance. They don't still do any joint family type things - they see each other on pick-ups/drop-offs of the children but any other communication is via text. The girls do live with their mum but see DP regularly throughout the week and stay over at the weekend.
They are now beginning the process of getting divorced.
The difficulty is that I have not been 'allowed' to meet his children yet - ex-wife is of the opinion that it is much too soon to introduce partners and that she is only thinking about the children's best interests. DP says he really wants for me to get to know them (initially just as his friend) but that ex-wife is blocking this - and he is worried about rocking the boat as he feels like she could use this to prevent him from spending time with the children. I do trust DP very much and I have seen communications which corroborate his version of events - but I feel very much trapped in this situation and I am at a loss for how to proceed.
I don't have children of my own (and I don't have any particular desire for this). I don't want to launch immediately into a step-parent role (as this would obviously be over-stepping), but I do equally understand that we won't have a successful long-term relationship if the introduction to his children doesn't go well. Any advice would be very gratefully received.