Is AUTHOR wrong in the post ? POST : Every year we have my aunts and my brothers family over for Christmas (eve, day, new years etc)

My family sets everything up. Does all the prep and cooking.

My wife and I also inevitably wind up baby sitting my brothers kids since - their idea of 'watching them' involves looking at their phones and saying 'ouuu, that's quite the mess you've got there'

They don't even bring their dirty dishes to the dishwasher -

Am i the asshole for saying 'not this year' keeping their dirty dishes out and serveing the next days meal on them?