2Times2Many - I feel all those same emotions. As you just wrote on my thread, we only have glimpses of what's going on in their crazy worlds. And there's no ryhme nor reason there. But there are lots of opportunities to spin. Don't let yourself be dragged into it all. Clearly he is trying to project some image of himself to some group of people who understand the inside joke.
Regarding the fact that freedom is outside your door. Well? Why not go away for a bit? Try something new? Perhaps your BIL can cover for you? Your kids are grown. Why not? If planning it all gives you anxiety, you could go where the wind takes you.
Me 41, H 47, M 15 yrs, S11, S13 BD 1: 11/4/14 we work on it; really I pretzel myself BD 2: 3/31/15 H goes down to "dorm room" 8/15: H back to MBR 10/15: H back in dorm room 1/18: H files, now divorced