I'm sure OP will get a slot on gogglebox or Jeremy vine to discuss shit parenting.
The whole holiday sounds awful.
You've endured a child up until midnight ruining your dick chats.
You've spent hours on here garnering support from strangers to update about the hideous brat of an 8 year old that you've painted to be demon product of your friends shit parenting.
We've all had a great laugh at gentle parents while missing the point they're not gentle parents, but ignoring that and high fiving our superior skills.
All culminating in a scrappy doo over air pillows, flouncing to the pub with new friends to slag off old friend.
Chants of 'wine wine wine
Tales of kicking over Dobble and drunk packing.
Friend deserves speaking to away from her kids. You might not be able to be friends after this, and I'm sure you don't care, but maybe a sober non judgemental chat would stop any further ill feeling.
Good luck.