I've had a revelation.
My mom got my childhood home in the divorce settlement, and my dad got our Lake Cabin. For the better part of 15 years (so 10 years prior to the separation), he's bandied around the idea of getting rid of it. I've always known that my dad likes to play "What If?" quite a bit, and rather than get upset every time he complained about not using it enough, or every time the mood struck him to start talking about selling, I just wrote it off as him venting. I don't think I've ever actually believed it might be lost.
At this point my younger sister is almost done with her undergraduate degree, and my dad's wife's youngest son is graduating from high school. ("Step brother" is not a word I'm comfortable using. That's for another post I guess.)
Here's what just clicked: my dad has told me over and over how growing up, his own father would say (to him directly? within earshot?) that as soon as my dad was 18, he'd leave my grandmother. And guess what? After all those years of saying that, my dad turned 18 and my grandfather divorced my grandmother. My dad is going to sell the cabin.