I know the feeling. I have thought about that time and time again. I hate what its doing to them. Hate it. I can't imagine life without them as they are everything that I am.
I can now say that if it weren't for the kids, I'd never have even gotten married. At least not to her, anyway.
What we - yep, we - have to do is shield them as best possible. Mine is trying parental alienation tricks on them. When they ask questions, I try not to talk badly about her, but at the same time I tell the truth. When they get older, I'll fill them in if they ask...not looking forward to that. I'm sure they will found out about her affair and all that.
This is sucktastic, man...
There are moments in this life when you are so confident in the rightness of your actions, that not even for a second do you consider the option that you might be wrong.