Cobra's sitch makes me sad too. But I do agree with Corrie, a business approach to this M is probably best....at least for now. At least this way, if they can agree to treat each other with at least the minimum kindness, consideration and respect you would a stranger or business acquaintance.....they might have something to eventually build on. There is a chance IMHO that if they can do this, and maintain this behavior.....some tensions might begin to melt away....maybe they won't though. However if they do then some respect might build, then trust can build off of that...then who knows? The worst they will have is a mutually civil household....hopefully.
I do find it sad though, I can't personally imagine being married to someone I didn't love.