Pun

I've been thinking about the sitch.

I think definitely take it as far as you can related to your own protection.

If she accessed YOUR account or joint accounts then fire away.

I would get separate "new" accounts from H if you haven't done so and change all passwords etc.

Then

As far as H goes...

It is not your job to save him from this woman.

These are his choices so let him learn his own lessons.

Not out of spite.

Try to let it go with honor and dignity as much as you can.

I am not sure I would get involved beyond protecting yourself.

It will just be another front in the "war"

My goal is to some day be the person my dog thinks I am