This just came to me. A divorced co-worker and I just had this conversation concerning kids and divorce. He told me some pretty frightening things.
Be very mindful of what the kids are saying about their mom, the time there, etc. Seems that parental alienation is hitting him hard. His ex is telling his kids things like he doesn't really want them, he's just a half dad, etc.
That kind of thing scares the bejeezus out of me. Ever since my ex told my son that he needed to spend more time with her than me, I have been very mindful of what they say. I will ask every once in a while, but not so much as to make them wonder. Just enough. It's sad to think that ex's more often than not will say even little things to the kids to sway them.
How does one undo that damage? I just make sure my kids know that I love them and am there for them. Hopefully that will be enough.
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.