General Discussion

We know she is very angry at Trump based on her behavior with him in public.
And we have seen how badly he treats her in some public appearances.

He is also angry at her because he had to pay her to move to DC last time and she made him renegotiate their pre-nuptial.

Melania of all people knew that Trump would never spend one day in jail.
She knows he is a vicious and ruthless psychopath who gets what he wants.

She recently moved to NYC to be with Barron who is going to school there.
So they are separated. They lead separate lives. Trump has girlfriends, etc.

She is probably again making money deals with the Trump people about moving back to DC.

Melania probably has zero intent to divorce Trump.
She is on the federal dole, money and benefits as prior First Lady and wife of current President.
And she can now yank around Trump and his staff about refusing to do any First Lady jobs
without adequate payment.