MIL suddenly refused to babysit

[Want2727]

Tonight having a meal with my family for my brothers 40th birthday. The meal is booked for 8 in a really posh restaurant. It has been planned for ages and we asked my in-laws to babysit DS 6 about 2 months ago.

MIL has just rung to say she won’t be babysitting as it is disgusting we won’t be including Ds in the meal as brother kids will be there.

Now my brothers youngest kid is 18 so very different to six. Where we are going has no kids menu. The adults menu will have nothing Ds wants. My brother did check when booking it and I said “your birthday your choice and it would be nice for us to have a night out without Ds”

So now DH is having to stay at home and I am fuming. MIL had known about the exact reason they are babysitting for 2 months and today on the day of the meal she decided she won’t be babysitting as it’s unfair we are not taking Ds.

So 2 AIBU here the first
Should we bring taking Ds tonight?
And
AIBu to be fuming at MIL

..... Wouldn't it have been glorious poetic justice to have left dh at home baby sitting....

Oh dear!
This is the crux of what some do not understand about some mils.

Of course it wouldn't be poetic justice! It would have been perfect. Her son wouldn't be socialising with her family, brilliant! And.... It's ruined a couple night out.

Some people are just so clueless it's painful.