The lunch sounds like a misunderstanding occurred and you don't "tell off" an adult! Did you do this AT the lunch? If so that's incredibly rude and bound to cause an uncomfortable atmosphere for everyone.
The wedding sounds normal to me, even traditional British weddings tend to be weighted slightly toward the brides family. With grooms family very much "guests" and not particularly involved.
You MASSIVELY overstepped bounds with the furniture! Who the fuck does that?! Large intrusive items, quite possibly not to their taste, nightmare to deal with, possibly intruding on their plans for that day (what if they'd not been in?!) - what WERE you thinking?! I'd have been furious too! How would YOU feel if someone arranged to have large, inconvenient items to your home with no warning?!
"We then had a huge row as she said I disrespected her." Should never have got to that point! What did you say to her/them?
Making out your ill health down to this situation/son and DIL actions - manipulative and cruel! And highly unlikely to be completely true. Plus as adults yourselves you are responsible for your health, not your DC. This is actually CLASSIC narc behaviour.
Also turning your dds into flying monkeys! Their relationship with their bro and sil is none of your business! And you certainly shouldn't be expecting them to sort out your mess!
The info on the engagement ring - irrelevant.
And I too suspect your son and DIL would have a VERY different story to tell. I suspect that's why they didn't tell you about the move to nearer her family and son changing job (though I actually think that's not a great idea to be so tied career wise to your spouse's family) BUT that's HIS choice. Even if you disagree you bite your tongue!
Back off, give them some space while also GENTLY letting them know you're open to talking to/seeing them when they're ready.
As someone also Nc with certain family members/relatives I can definitely understand the possibility of "straw that broke the camels back" plus the faux protestations of "I don't know what I did wrong" when they know EXACTLY what they did wrong AND that they behaved unreasonably by ANYONE's standards. I've never come across anyone irl who's gone Nc without a damn good reason.
mypointofview is spot on!
Whoa! You bought them a HOUSE without asking? What on earth! The more I learn the more I think you're lucky he never went Nc earlier!
@LydiaLunch7 maybe in isolation not reason enough but combined? Plus all the other stuff pps have gleaned from other threads sg buying them a HOUSE without their knowledge or consent?!