This guy is an idiot. He has a wife who might be interested in spicing up their sex life, whether we agree with how, and he instead going to embarrass her in front of the kids. He is toast. And I would agree with whatever she decides to do. What a tool.
His kids are in high school, but he doesn’t intend to actually show the movie - just see his wife’s reaction. As for that, well, I warned him. Some people have an odd, almost cruel way of joking around with their spouses. They definitely have a tempestuous relationship, so maybe this is part of their usual dance.