Okay, first, WOW. Talk about lack of self-awareness.

Second, did it ever occur to LW that maybe the reason DIL is chatty around her friends is common interests/shared history? I've often been pretty removed at family gatherings because I have nothing to contribute to a discussion of the current Reds roster, and they've never displayed the slightest interest in the stuff I do/enjoy/think about. Also, they're mostly assholes about it, which brings me back to point the first.