Dean,
Sorry you are having to go through this. even though it is tough, it's not the end of the world, It's just the bottom part of the roller coaster. Kids are smart, they can see how you are acting and also see how your wife is acting. I told my kids at a young age to try and think for themselves about what they see and someday they will figure it out. Having your wife say one thing and you another is confusing. But, as they say, actions speak louder than words.
I know this won't take away any of the pain, but "time" and being able to deal with life during that "time" will give you the results that are best. Trust your kid's thinking as much as you do yours. Your wife will do as she sees fit. Who knows, maybe someday she will get a clue. My ex-wife did.
Hang in there pal, If there is anything I can help with, just let me know.
Dave