So not really a step issue as such just a lack of understanding from my family of the issues that we face.
My family have decided to have a large family party with all aunts, uncles and cousins as it has been a year of special birthdays and anniversaries etc.
My mom called me last night to tell me that instead of the meal that had been arranged previously (that I had already said I didn't really fancy) to let me know that they had now booked a hall and were having a party instead. She told me she expected me DH and all the kids to be there because it was a good opportunity for the rest of the family to meet the kids.
Now DH and I have been married for over 7 years and lived together for 10 so it is not as if there hasn't been plenty of time for them to see the kids if they were that bothered, in fact we have no kids together and all the kids were at our wedding so they have met them at some point over the years at other meals etc.
I asked when they had booked it for to be told it is on the 9th Nov, checked diary and told my mom that it was our weekend with out children. We have 1 weekend a month in which my DS goes to his dads and my DSC's stay with their mom.
I am now well and truly in the doghouse and have been told that I should re-arrange not just my DS contact with his dad but my DSC's weekend with their mom.
I am really annoyed with my mom for trying to guilt trip me about this. I know that my ex would be annoyed as it would be another month he we go without seeing DS(although it is his choice to have reduced down the contact) and I know that DSCs mom would happily let us have the kids(she doesn't like us having the 1 weekend a month as it is as court appointed EW access) but I know that they would not just swap weekends and then DH would have no time on our own again until Dec (selfish I know).
I suppose what I am most annoyed about is that my mom is trying to guilt me although she should get by now that it is not as easy to just switch things round when trying to deal with 2 exes and actually if the kids were that necessary to the arrangements why couldn't they have just checked dates with me before arranging as it is only one we per month we don't have them and yet I am in the wrong for not demanding we have the children regardless of the exes!