My sister and her husband are academics, no kids. They offered to babysit for us for our anniversary so we could go to London and stay in their flat for a night while they stayed in our house and looked after the 2 kids (4 and 2). After offering to look after then for two days, they revised this to 10am - 10am. As this would have meant getting up at about 7 to rush home, we (reluctantly) asked my Mum to take over for day 2 so we could go to an exhibition and make the most of the train fare.
Then, the day before we were due to go, my sister phoned to say that they had decided it would be easier to look after the kids at my Mum's house. They would sleep in her bed (my Mum's). We felt that the offer (which was supposed to be our Xmas present) had been chipped away at and my sister was now dumping the kids on my Mum. So we cancelled. We didn't go to London and my sister and her husband went back home.
My Mum said very forcefully a couple of days ago that I should apologise as my sister had made a kind offer and I had thrown it back in her face. She also said that they had 'taken time out of work', saying that her job isn't like mine which I can 'forget about at the end of the day' (I work two days a week as a teacher).
I am so hurt that my Mum took sides so forcefully without hearing both sides - there are always two sides to a story and the truth is usually somewhere in the middle. And what she said about my job compared to my sister's has really hurt me. I just want to cry whenever I think about it.
Am I overreacting?