My partner has two children aged 18 and 16 from his previous marriage and they live with us 50/50 (week on/week off).
This week is our week, however two weeks ago my OH found out he had to go abroad for work this week. He thought he would turn it into a nice trip with the kids though (he would have to work a bit in the days but they could chill by the pool etc and they could all spend time together in between) and asked them along. SS16 said yes as he has just finished his GCSEs but SS18 said no as he works full-time (left school at 16) and recently went on holiday with his friends and therefore didn't want to take anymore time off. Fair enough, but I asked OH if his mum could look after him for the week rather than stay with me here as I'm super busy at work, don't really have time to be cooking meals in the evening etc (I can just do quick things for me but I would feel under pressure to make food for him when he is home from work etc). Selfishly I was also looking forward to the peace of the place to myself for a week as I never get that.
Unfortunately OH and his ex aren't on the best terms so OH asked SS18 two weeks ago to talk to his mum and see if it was OK he stayed with her the extra week. He said he had spoken to her and she said yes. We confirmed with him again on Thursday last week and he said it was all sorted.
Yesterday was change over day and it transpires SS hadn't asked her at all and just dropped it on her that he wasn't coming back to dad's for the week and was staying with her. She then sends OH a mean voice message saying how he's a terrible parent, always shirking his responsibilities (not true at all, he is a great dad), has no respect for her time etc etc. I do understand why she is put out as she obviously didn't know that the older son was staying with her longer, but we really did think it was all cleared with her as we checked twice.
Also she knew OH had asked SS18 to come with him but he had said no, so she would have known he wasn't in the country this week.
I just feel sorry for my OH as she says really harsh things to him but I think she is overreacting here. OH will send SS18 money for whatever he needs this week.
I have now offered to have SS here but I think that will just cause even more drama!
Do you think we are in the wrong here? Maybe OH should have confirmed with her too but SS is 18 not 8 after all so we should be able to trust him when he says he had cleared it with his mum.