Hi Silent_Scream and I am sorry for your predicament. It is much better not to talk with your wife about the WTBTS, tell her how much you love her, and plan fun activities that you and she can do and will allow your wife to interact with "Worldly" people, especially if those activities will prevent you from going to meetings. I also recommend that you read Steve Hassan's books (i.e., Combatting Cult Mind Control and Releasing the Bonds: Empowering People to Think for Themselves) and visiting Steve Hassan's website www.freedomofmind.com.
If your wife continues to talk about going to Bethel, just tell her how much you love her and that you do not want to cause her and other Bethelites cognitive dissonance. If she persists after saying how much you love her, you can always ask her, "Who does she follow spiritually and who is her mediator with Our Father?" If she says Jesus Christ, than ask her if she is sure about that and show her Watchtower and Awake! articles that say she must follow the GB. Do not say anything negative about the GB or how you feel, let her discover the truth her self. Good-luck!!!
Peace be with you and everyone, who you love,
ABibleStudent
P.S. - If you don't like your work now, you should also consider getting a better education in a career field that you love and become more financial secure. If your wife does decide to divorce you, you will be doing something that you love and you will be able to endure the financial hardships of divorce. If you wife asks why you are getting more education, you can tell her that ,as head of the house with the "New Light" changes about the generations, you decided that you must provide for your family encase the the end of time is not for another century.