This decision was presented like this because it's part of Scarlett's story arc, not a random political decision.
I've only been deciding it based on results 1 turn ahead. How do the choices effect the arc?
Oberon has a wife, it's mentioned in one of the other council sessions.
I'm not sure how to interpret that following the lizard painter example. Since apparently gays were being forced to get married in Rivelon is that evidence for or against?