hiscott I wasn't sure about this until you posted the thing about your last conversation.
Your situation sounds a lot like mine, high pressure jobs, families and life. My wife finally broke and the easiest thing to do was remove me out of the situation. Often over the last several months she's talked about how much happier she is, how she's not as stressed etc. But it was all a facade that she put on to try to convince everyone including herself that the whole thing was better for everyone.
Fast forward to today, 11 months later and its becoming clear she is starting to see a) the grass isn't greener, b) she had a good loving husband, c) there are even greater demands and stresses on her now she's mainly on her own and d) the kids are as resilient as she wants to believe.
Her comment "I suppose" is telling in that she can see past the bad now and possibly see how it can be rebuilt new and better.
So for you keep a positive attitude and continue to focus on you and the kids. Be the responsible adult and show kindness, even love. Don't initiate any further discussions and if she brings them up, listen and validate what she says.
So the whole thing about trust and how everyone is doing I think was actually a positive because she's seeing things in you that are good.
If we really want to love, we must learn how to forgive. - Mother Theresa