Darth,
Your post sounds exactly like my AW, but mine's further along and has a more aggressive personality. Mine was much like you describe at first. I hope she doesn't get majorly aggressive. Mine has started to lie, she's seeking comfort outside of the marriage, and started doing some really, really, really weird things. You have to know what you're getting into. Read a lot of the posts here, go to alanon, and if possible go to a therapist that has experience with substance abuse.
Your sanity is at stake, and you have little ones to protect.
Redd