The ball is in your court. IDK your specific circumstances. You can fight her for restitution. I recommend only fighting a battle you can win. You can continue some relationship with her, but why would you with someone who is so against you?

I’ve been going through similar dilemmas merely with people who weren’t ‘with’ me (therefore they are against me). But no one was financially corrupt, just unloving when they said they were. I’m sorry you are suffering so much with this toxic family relationship.