Bit of a long one, sorry
My mum has recently left a really demanding job where she was treated really badly and is now more or less out of work. She's just found a new part-time job working evenings.
She's agreed to work weekends but can't work this weekend as she had agreed to look after my DS while I attend two Baby/Toddler Shows as I'm setting up a new toy shop and would like to show it off and hopefully get some more business. She was already having DS on Saturday so that I could go to a local show, but also agreed to have him on Sunday as I was asked if I would like to fill a slot at a London Show as someone had cancelled.
I don't drive, and so my best friend had offered to drive us down at 4am to be there in good time to set up at 8.30, and we'd drive up on Monday, staying over night so that my friend wouldn't have to drive to and from London in one day.
On Saturday, is it my cousin's baby girl's first birthday and they are having a party in the afternoon for the children, which my sister had agreed to take DS to for my mum, and later in the day for the adults.
All fine, and I have been busy making plans, when mum tells me earlier that she is going out with her friend on Saturday night and is meeting her at 8.15 and she simply has to go as she says that she's let her friend down the last two times that they have arranged to meet - also, she has spoken to my sister who is now refusing to take DS to the party as she is not on my mum's invitation and says that she has not been invited, and mum does not think that it is very fair that she will now have to take DS to the party and will have to miss out on the adult's party later on.
I have always kept her up to date with my plans and she knew that she would either have to have Charlie over night, or else have me bring him over to her house at 4am (she will not sleep in my house).
I ended up telling her that I'd just have to cancel the events then as if she can't have Charlie, I can't do them (which is true, she is my only over-night babysitter) and when I got home, I did just that.
I know that I really did spit my dummy out and should have let myself cool down before I reacted, but I just get really upset when she plays the "it's not fair" card at me when she's agreed to help me and then moans about it.
So, AIBU?