Basically, long story short, huge argument with DP and his DM & DS, which led to NC. I still spoke to MIL with updates on our baby etc. DP was fine with this.
We all met up and sorted everything out, happy days and all friends again.
So the other night my BIL and his girlfriend invited me, DP and DC on a day out the following day, which we accepted. We got there and I asked where SIL was, we then got told they hadn't been asked. I thought nothing much of it as I knew our niece would be at school and we see them a lot anyway.
We had a lovely day, however when we got home I got a message from MIL asking if we'd all been out, I replied yes, it was a last minute arrangement.
This then led to MIL insisting I make no effort, I'm unloyal etc.. which I don't understand as it wasn't me who arranged the bloody day out! I replied saying I was extremely sorry, I was unaware that SIL hadn't been asked and we can arrange something soon. I then got no reply.
I then informed DP of what had been said, who told his mum that she was being unreasonable having a go at me and if she was going to message anyone about it, it should've been him.
This led to an argument between them and I received a message from MIL along the lines of "thanks for telling him, I've now been had a go at by x, thanks a lot"
I've now had posts on social media directed at me calling me a snake & various other things.
I really didn't want to argue, I feel awful that she wasn't asked, but again.. it wasn't me who organised it! I tried to message SIL to apologise if we'd upset her, but she's blocked me on everything.
I feel absolutely awful that she was upset, however it was a last minute plan that me and DP were invited to.
Aibu to think that this whole drama and argument is completely unnecessary?!