I have been fretting the fate of my artwork since last summer, and I have long since resigned myself to the fact that once the house is sold, whether we paint over the walls first or not, it does not really matter. Neither I, my W nor my S's will likely ever see those images again in person. Even if we do not paint over the murals before we depart, we will still no longer have any control over what happens from that point forward. For all practical purposes they will be lost to us.
But if it would somehow mean the miraculous restoration of my M and my family I would sacrifice those walls and even burn the whole house down to the ground, in a heartbeat, if that's what it would take. Like I told my W, without my family intact, those walls are just covered with useless images that have lost their meaning. My W's betrayal has turned these paintings into a painful reminder of what once was. A bunch of paint on the wall is no consolation for the loss of my family.
I have lots of photos capturing these works somewhere, now in W's possession likely. I will have to make a point to shoot some more photos on my own some time before we finally say goodbye to them.