I was sharing with my boss my "fun" family get together with snobby SIL. She pretty much topped my story! Her daughter is engaged to be married. Fiance's parents are extremely materialistic (especially the future MIL) and everything has to be expensive and name brand and always shown off to everyone.
My boss is total opposite of that. Her daughter is a school teacher (ie doesn't make a ton of money) and about the sweetest person (just like her mom, my boss) you could find. Boss and her hubby decided to invite future in-laws (they have socialized with them a few times before over the past few years) for a nice prime rib dinner at boss's house. They were supposed to be there at 3 - with appetizers. Dinner was to be at 5:30. They showed up 4 1/2 hours late! Boss said her nice dinner basically had to be reheated in the microwave. Then there was the "fun" gift exchange game. Future MIL brought a gift and apparently wanted it for herself! Who does that?! When it was her turn to pick a gift, she picked the own gift she brought. Boss stole it from her (after all, isn't that the whole point of the game?) and boss ended up with the expensive gift from Pottery Barn. Boss said later her husband was overheard consoling his wife "I'm sorry you didn't get your gift...we'll make sure to get you another one". OMG!
Then a week or so later there was an incident in the car where fiance was talking to his mom on the phone with speaker on. She didn't know boss's daughter was in the car with him and totally started bashing boss's daughter, who ended up in total tears. I feel so sorry for boss's daughter. She is going to have to live with that Bitch of a MIL for the rest of her life!