My DD10 has a 50:50 care arrangement; she lives one week with her bioD and SM followed by one with me and my partner.
She is in Year 6, so we are in the midst of completing her Secondary School application. She is entitled to go to either the school nearest our house, or the one nearest her Dads, and there are three other schools that are realistic travelling times away.
They are all holding their open evenings between now and half term (when the form is due in) and when I found out the dates, I realised that all but one of them was on evenings that DD is with me.
So, I thought I'd be reasonable and I emailed exH, offering him the option of taking her along. He replied, thanking me, and stating that he would take her to ALL FIVE.
Now, I know this was probably my fault; I should have been more specific in my email by saying which ones I wanted to go to with her, so that he didn't take advantage, or I could have said - no, that's not what I meant, but I know that if I take BD along to any that he knows about, he will come along as well and expect to walk around with us, which I would prefer not to do as BD picks up on the atmosphere between us.
I am happy to go along to the schools and have a look at another time; in fact, I'd like the chance to see them operating normally with students in, not just when they are showing off to lots of parents together 
But, I have now found out that DD's SM is going along to all the open evenings as well
. I just feel like I'm being pushed out as her mum; exH has taken the opportunity to monopolise this milestone in BD life, involving others, but not considering me.
I've told BD that I will be looking at the schools and have been chatting with her when she comes home from the visits - I'm regretting offering exH the chance to be involved though 