Contrary to what others here have said, I don't think Jonathan showed good judgment by moving out. His decision was selfish in that he gave little thought to the other children and how this split would affect them. He and Annie could have worked through their issues in private and if they ultimately decided that Annie's indiscretions was a deal-breaker that would be bad enough. But by moving out as he did left the girls in limbo, potentially unsure of whom to blame or, worse, feeling guilty because they loved both parents but sensing they needed to take sides. I think both parents acted selfishly, irresponsibly toward their children.