Whether the wife feels her husband really did try to kill her or not, it is her duty to not let the government get satisfaction. She can divorce him and part ways once the trial is over and he is acquitted.
Giving a hostile 3rd party satisfaction is plain wrong, no matter the situation.
This Mona character is another person who perpetuates the system while proclaiming to oppose it.
If the system is so worthy of replacement, why would anyone cooperate and let the system rule them or follow the system and its rules?
Cooperating with the system means that you deep down inside submit to it's authority and believe it is worthy of ruling you, hence there is no reason to replace the way things are with a new system. This is why nothing will change.