She's mounted a campaign of sheer malice against him and wrecked his reputation
Amber would have done this to Johnny regardless of whether she stayed with him or didn't. Narcissist have a habbit of destroying the person they are with, they have a need to win and also appear the victim, this is something universal about them.
I think Johnny knew that Amber was slowly destroying him whilst in the relationship but didn't fully understand why, his comment about her ambition was greater than her love for him was telling. I do think if they had stayed together Johnny would have retreated into himself more, drinking more, more substance abuse, not seeing his children as much to keep the peace. Her faux concern of his addictions were to place her in the light of the victim,when in reality she wouldn't have cared less if he'd od'd so long as his money was left to her.
She was angry, because he was wising up, she had not yet finished with him or used his benefits sufficiently, narcs do not liked to be discarded, they like to do the discarding, and she was not ready. So plan B, she did not get the settlement she wanted so she decided to ruin him and his reputation, the shame could have meant extracting more from him, it also had the added bonus of cashing in on her victimhood.
I am pleased he has had his day in court, Amber never banked on him doing this, she knew he was a very private person who really must have been mortified in having to lay bare all his private life to the world, his peers and his family.
She knew he felt shame, Amber does not feel shame, it is missing, along with empathy and love.
And for those who think Amber will come to harm after this trial if she loses, she will not be destroyed, she will already have many plan B's in the making, she thinks ahead, where others would hide in shame, she will not, narcissists do not understand shame.
For me this is not just about domestic abuse, it is about domestic abuse with a narcissist, Amber truly will not understand why this is monumently not going her way, she fully believes she has been abused, she doesn't understand fairness or truth, she can only see things from her point of view.
There is no reasoning with a narcissist, ever.