I also dont think people shoould stay together for the sake of the kids, but I didnt cheat,steal ,lie I wasnt abusive physically or emotionally and I dont understand beyond our financial troubles words such as I dont trust you and my heart is broken. What does that mean?
You can't trust anything she says right now, and only half of what she does.
She is still working on rationalizing her choice. The only way to make her rethink that choice right now is to not react the way she expects you to.
Well if she saw you as being the provider for your family, she tied alot of her security in you and if you failed to step up to the plate. to do something that made your family financially secure, that would definitely be a trust issue - don't negate this possibility, it's very real to alot of people, especially in our current financial/economic climate.
If she can't feel secure with you, she can't trust you, being a nice guy is only going to get you so far.
As far as her heart being broken, maybe there is more there than she is admitting right now - lie or not, that's a pretty strong statement.