Might be the post of the year.
Two of my mom's sisters are like this. Years ago, we did a family trip to our old cottage in Maine. For a week it was just my wife/kids, sister's family and my parents. For a week, we'd all take turns making dinners and breakfasts, lunch was every man for himself. We shared beers, food, wine, whatever and we all had a great time with no arguing.
Then, her sisters and their families showed up. We were immediately shifted to another cottage for 2 nights and told that there would be 'shares' of the food bills they brought with them for each family to pay. We show up to this other cottage and one of my aunts had taken it upon herself to stock the place with food that she bought for us, handing me and my sister's husband the bill with our 'share' of the cost which included - and I #### you not here - a giant Costco or Sam's Club ham. First of all, my wife is a vegetarian. Secondly, we were there two nights. The hell am I supposed to do with a giant ham? Gnaw on it for 48 hours? Thirdly, we had been doing just fine on our own for a week. I don't need another person grocery shopping for me.
I told her she was out of her mind, but my mom didn't want to cause any problems, so she paid the bill for me after I protested which just made me angrier. I left the ham in the bag, uneaten and later learned that I hurt her feelings, but my lord, what kind of idiocy must one possess to think this is acceptable behavior? They've asked us numerous times when we're going back to Maine and my reply has been the same - never. They ruined what was a pretty nice trip over something stupid like money for a food bill. It was all unnecessary and I won't be party to anything like that again.