Bit of a background but dont want to give too much away just incase 
My mum is quite a dramatic narcissist. She is never in the wrong and if we have a disagreement she'll leave my house, drive home then ill get a text saying shes in floods of tears asking "are you dissapointed in me? Do you hate me? Im just trying to keep you amd your sister happy" blah blah... Not all if that at once but its always always those lines iyswim
Anyways, i took the kids to hers yesterday. We went for lunch and then it was agreed that she would have them overnight until late this afternoon so that I could do work. I have a demanding job that entails a lot of working at home on top of regular working hours. And with the holidays, ive fallen behind quite a bit. DH and MIL have helped out as much as they can.
Anyways, DM hadnt seen the DCs since before they broke up. Apart from popping over for max an hour on christmas day to hand out presents; but had to leave because the mess was "making her OCD go mental" (her words)
I dont ask her to have the kids anymore. Its all up to her if she wants to have them then fine. But i dont ask.
I left them at the cafe around 2:30 as I wanted to get back to do a few bits and do some work too.
Im sat happily in the office working away thinking I could get a load done by around 5-6 ish and then the kids would be home in time for tea.
1:30pm i hear a knock at the door.
She brought them back early because she wanted to go clothes shopping. Onviously i questioned this and she insisted that she'd said after lunch. So i checked my messages and it did say late afternoon. Which to me is 4ish at the earliest.
Anyways, i forwarded this text to her just to prove my point. I then get the usual "im crying, had to stop in the layby cause im crying so much, are you dissapointed in me?"
I left it...
She has then gone and tect my husband saying shes been on the phone with my DGM, no doubt having a good old whinge about me and how disrespectful I am.
The woman hardly sees her DGCs. Max 2 hours a week. Never does anything with them or takes them anywhere anymore. Especially since I stopped asking her to have them.
AIBU??? Am i being a spoilt brat because she brought the kids back early without texting or phoning to tell me?? My DH had gone out for the day. For all she knows I could have gone with him!!!