You should treat your wife as well as you would treat any family friend or acquaintance who is doing you a favor. I don't think that a polite hug and "hello" is out of question.
But SD is right, focus on your kids. Save the R talk for later.
And an early "welcome home" to you.
Me: 44, Wife: 39 M: 17 years T: 20 years Bomb on 08/25/09 1/13/10: MC started 1/28/10, 2/8/10: More bombs 8/28/10: Wife moved out No talk of D, no movement