But, her parents, although "uber" dubs, need-greaters, are also very balanced and not at all dogmatic.
Her dad is one of the best guys to have a beer with and talk about how retarded that "tightpants" talk was.
Sometimes those can be the hardest to make see reason - they're not affected by the dogmatism so they dismiss it. They have no real integrity and feel no need to stand up when they see hypocrisy (like the tightpants talk where AMIII made a bunch of rules only a couple weeks after the book study bit about how the pharisees burdened the jews with a bunch of unscriptural rules.) My wife somewhat falls into this category - anytime I make a point about some bit of doctrine and how it could have negatively affected people, she says something like "Oh, well I never really cared that much about that anyway" and just assumes that no one else did either.
Family and friends are powerful influences and sometimes a more emotional conversation can make someone crawl back into the Organization just out of fear of losing something.
This is good advice. Cults don't control people through logic and reason, they do it through emotion. Your wife may see the logical problems, but she could still be held in by emotion, or may rat you out if placed in an emotional circumstance.
Do you do "family worship" or anything like that? I wish I did before I woke up, because that's a great vehicle for talking about anti-JW things and getting your backing straight from scripture so you can't be argued with, all under the guise of being a great spiritual head for your family. You might use the example of the isrealites when they followed the instructions of rebellious kings. Isreal was "god's organization" of the day, and the King it's leader - but the isrealites themselves where held personally accountable for what they did and if they supported an evil king they paid the price too. If they went along with the king (perhaps, waiting on jehovah) they usually died because of it.