ProfJ

I'm sorry to say, but it looks like you were a novelty for her, and now the novelty has worn off.
She basically bought you by dangling her wealth in front of your face, which led you to leave everything including a job, that would have been your major source of security.
As a woman...no matter how much money we make, we want a guy who will have the ability to assert himself by proving that he can take care of himself and us as well if everything goes South in our finances.
I understand that she swept you off your feet, but that's mostly power trip. (which is wrong, any way you look at it)
Now...her maintaining your children on her payroll is still some sort of powertrip. He's screwed you by ruining your life but you have no other choice but to take it, because she still throws money your kids way. It's a choice now whether you suck it up or do what is legally right, if so...
I hope you have a very good lawyer, who can at least get you a chunk of her wealth, enough for you to live comfortably and support your children as well.
it's cold...but it's all business now.