Kpin-
Do yourself a favor...go take a look at my story, and read this from your husband's view.
I've got not one bit of doubt that he doesn't have a clue how far things have gone, or he wouldn't be so fine with you're IMing this guy.
Take a look at the whole thread. See the conclusions that my wife came to. Go over to the marriagebuilders website, and do a search for a thread about online emotional affairs by someone named cardsonly.
Don't do this thinking 'well, my story is different'. Cause it's not. It really isn't. The more you come to sites like this, the more and more you see that the situations are always very very similar...the emotions behind them the same, and the fixes to these problems are pretty much universal too.
Don't run away from this thread because I've posted something that you don't like, please. Read what I've said...THINK about it. Go to MB, read that stuff, start posting on the forum there...and you will learn a LOT.
Good luck to you and your family.
http://www.loveshack.org/forums/t49539/