His wife is likely from the same family background as him
She is. Part of a circle where the Duggars were Rock Stars. So he'd have been something of a catch from her parents' persepctive.
But now ..... he is a huge liability.
His income stream has been smashed to smithereens. There might be a question mark over the extent to which his parents will continue to support him in the style to which he is accustomed if over time they come to blame him for killing the original golden goose/any future Redemption Tours. His status in quiverful circles must have dropped very significantly.
So Prince Charming has turned into a particularly slimey frog once kissed.
I hope the above takes huge bites out of the family/freinds/peer pressure she'll be under to stay with him no matter what. The fact that she could make a mint out of exclusive post-Duggar interviews and a tell all book might be too attractive a carrot for those who could normally be relied upon to Jesus-Arm-Twist her into staying.
Grabbing a chance to make her into a rising star you have control over could prove more attractive than sweeping up the fall out left by his broken and deeply tarnished star.
Not least cos if you've been the "poor relation" the chance to overtake economically, ststus-wise AND put the boot in can be irresistable.
I don't hold put much hope that anybody would offer Anna a supported way put or her own sake. But the above might turn the odds in her favour of not being guilted, shamed, blamed and bible bashed into sucking up every bowl of shit her huband lobs her way, for the rest of her life.