Adult cousins - all in well-paid professional jobs - think head teacher, law partner etc decide nice idea to surprise party for Uncle's (their dads) 70th...
Originally, was going to be at one cousins house. A
month before venue changes to gastropub... As a 'bit more of an ocassion'. Menus circulated a couple of weeks before and choices made.
About 16 family are invited- all these invites a combination of email and snailmail.
We have had a tough time financially recently... OHhas been made redundant - cousins know this.
Venue was quite a way from us - four hours drive - so had to stay overnight - did B&B - cheapest we could find-just under 100£. So with fuel quite a lot.
All have great time inc surprised uncle. Cousins get bill... Then each couple
are presented with a bill for 120£! 

There was a ripple of discomfort from everyone... Then people were scrabbling around for wallets etc... We paid,..
but this left us considerably short for the rest of the month. We never spend this sort of money on meals!!
At no point had this cost been mentioned..during the arrangements . There was no cost on the menus - and each menu was headed 'pete's
celebration dinner.'
So AIBU in feeling we were essentially charged by stealth for the celebration? Especially in light of cousins professions they are hardly living on their uppers...
What would you have done? Especially when presented with bill??