It is another classic boomer vs millennial dilemma . Here we have a millennial son-in-law having to stand up for his generation (yet again) to his boomer mother-in-law who calls anybody younger than her a millennial, and millennials are lazy folk who don't want to work. This story takes place in an amusement park. A millennial family with the boomer grandparents included, took a spring vacation to an amusement park. The park had just opened for the season, so it wasn't as full of visitors, but…