I completely agree. There is no way to say "who cares what he/she does?" if you are financially linked. That's a huge concern as is and even more so when there are kids involved.
I also understand what you've been doing and why. It sucks to love someone so much who is just acting like such a schmuck. I live it everyday with you.
But what do you want to do? In a perfect, realistic world, what do you want to happen next? And how are you going to make that happen?