How can They do This?

We have spent every Thanksgiving with my wife's parents, even when we lived far away, so they wouldn't be alone. My wife's brother and his family have always gone away for Thanksgiving.

My wife's parents are now totally dependent upon my wife for everything, and she spends about half of her time every week caring for them. We moved so that she could do this for them. Her brother, who lives equally close, does almost nothing. He has always been her parents' favorite because he was a football star. This year, he and his family are staying in town. They are spending Thanksgiving with my wife's parents, and we aren't invited. My wife has been asked to take her mother shopping for the groceries, however.

This seems like the last straw to me.