Have recently disengaged completely with doing anything for DSC due to an argument with DH.
Basically we had an issue recently with 12 year old DSS. Won't go into the whole thing but basically he'd gotten in trouble for speaking inappropriately/meanly to another child at school, there was more to it than this, involved WhatsApp and messages ect... It went on for a little while as school got involved. It wasn't all him, the other child was involved as well and it wasn't anything sinister but obviously stern conversations needed to be had, discussions about phone use ect.
Anyway, me and DH were talking about it and I had an opinion on something and shared that. I guess he didn't agree because he got cross and told me it was nothing to do with me and I seemed like I was 'only interested for the gossip '... 
gossip about a 12 year old falling out with a child from school?? 🤣
Anyway .. it pissed me off because I do a lot for DSC. Upset me in fact. I said as such at the time and said if things like this are 'none of my business' then nothing is. He doesn't get to decide the things that suit him that I do for DSC are my business but the other parts, the tough parts, aren't.
I work part time so tend to do most at home, tidying kids rooms, ours and DSC, washing clothes, changing beds and so on... Not anymore. He's been having to do it all.
I'm no longer free during the upcoming school holidays to help on my days off and so on...
He's annoyed, says I'm being petty. I probably am but I don't care. He stands by that I shouldn't have given my opinion so I'm standing by this. I don't see why he should get it both ways, he's happy for me to spend my time and money on his children but they apparently then become nothing to do with me during other times. That's not acceptable to me. It's either all my business of none of it is.