Let's get something straight. I never bought that and never will. Spouses have a duty to defend each other, above all else.
Burden of proof for shame and scandal - probably less than "beyond a reasonable doubt". (And I've said I'm not a fan of this, even with Moore).
Burden of proof for criminal conviction - "beyond a reasonable doubt".
Burden of proof to lose support of spouse - "beyond all possible doubt."
If your spouse isn't screaming for your release even after you've been convicted, you married the wrong woman.