Still Groggy,
Use the Bible to discuss the conscience matter.
First learn how and why the Bible supports the use of your conscience for yourself. Know it forward and backward before entering any discussion.
To accomplish the first step do some internet searches and start some threads here about it. There has been some fantastic discussions here on conscience and it's appropriate use as encouraged in the Bible. Apostle Paul wrote a boatload of stuff on conscience.
Second, lay the groundwork with your wife, that conscience matters are just that, the GB don't put those types (mostly) of hard and fast rules in print. Use that to your advantage. For example, karate, r- rated movies, rap music, some video games, etc etc. are conscience matters. The society says you can't be exemplary if doing some of those - meaning - you can't be m.s. or elder or pioneer and maybe just maybe depending on the anal retentiveness of your local body you can't read WT or handle mics. or work behind the counter. You are not marked or considered bad association - if the rules are followed.
Look up some WT articles on conscience and how we exercise it. Look up some more about not binding others up with our own personal conscience decisions.
Perhaps when you're ready tell your wife that you are uncomfortable with her forcing her conscience on you. Tell her that those with weak faith must have strong consciences and those with strong faith.... well you get the point.
ok maybe you shouldn't say that, but imho you'd be right. Others here will have a much more educated way of helping you.