I am surprised you are on speaking terms after that stunt

Seriously, what is wrong with people?
And looking back, are you like me? Does it still bother you? Although we politely said "I think that is enough" when our dinner guests discussed ordering an expensive bottle of wine (on top of their cocktails and apps and "market price" mains), I wish I would have be more aggressive with my tone from the minute I realized we were being taken advantage of. This was YEARS ago, and it still owns space in my brain.
Don't you wish you would have told your BIL that
his guests would have to pay for themselves and you would cover you and your husband and your MIL/FIL? Hindsight is 20/20 for real.