Try & keep this short. ex-H very difficult. Left me & kids 9 years ago when youngest was 1 for OW. He pays maintenance under duress, has been very difficult about sticking to dates, is unpleasant to me wherever possible & is generally a pain. DCs who are now 12 & 10 increasingly reluctant to stay with him every 2nd weekend - but I encourage it, as far as I can, because I think it is important for them to have a relationship with their Dad.
They have just spent their annual summer week with him & arrive back telling me that when they are due to stay with my Mum (while I have an operation) they are going to spend 2 days & 1 night with ex-H's parents. I express surprise & say that actually they are staying with Granny (who they love staying with) & she has lots planned for them, so we will have to have a think about this & talk to her. They also hand me a piece of paper with 2 dates in October written on it, to take DC1 to a concert & DC2 to the ballet separately and on separate weekends. I ask for a bit more info & get told that ex-H's parents will be taking them to these events.
ex-H phones me later in the evening & is spoiling for a fight & tells me that I need to be accommodating of his parents' wishes as they are "doing the best for the DCs". I said I was delighted that his parents wanted to do this (they have not helped out once in the last 9 years), but perhaps we could get weekends sorted out first & then they could do this on his weekends. He lost the plot completely & told me I was being unreasonable (along with alot of other much less pleasant remarks about me) & his parents were elderly & that I was making the DCs miss out.
Soooooooooooooooooooooo, need some MN input. AIBU & how would you handle this?